Document:

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                                                                   EXHIBIT 4.04

INTELLECTUAL PROPERTY SECURITY AGREEMENT

         INTELLECTUAL PROPERTY SECURITY AGREEMENT, dated as of September 26,
2000, between DeMarco Energy Systems of America, Inc., a Utah corporation
("DeMarco Energy"), and the secured parties signatory hereto, and their
respective endorsees, transferees and assigns (Collectively, the "Secured
Party").

WITNESSETH:

         WHEREAS, pursuant to a Secured Convertible Debenture Purchase
Agreement, dated the date hereof between DeMarco Energy and the Secured Party
(the "Purchase Agreement"), DeMarco Energy has agreed to issue to the Secured
Party and the Secured Party has agreed to purchase from DeMarco Energy an
aggregate principal amount of $1,500,000 of DeMarco Energy's 10% Secured
Convertible Debentures, due September 26, 2001 (the "Debentures"), which are
convertible into shares of DeMarco Energy's Common Stock, $.001 par value (the
"Common Stock"); and

         WHEREAS, in order to induce the Secured Party to purchase the
Debentures, DeMarco Energy has agreed to execute and deliver to the Secured
Party this Agreement for the benefit of the Secured Party and to grant to it a
first priority security interest in certain general intangible property of
DeMarco Energy to secure the prompt payment, performance and discharge in full
of all of DeMarco Energy's obligations under the Debentures.

         NOW, THEREFORE, in consideration of the agreements herein contained
and for other good and valuable consideration, the receipt and sufficiency of
which is hereby acknowledged, the parties hereto hereby agree as follows:

ARTICLE XXXIV Certain Definitions. As used in this Agreement, the following
terms shall have the meanings set forth in this Section 1. Terms used but not
otherwise defined in this Agreement that are defined in Article 9 of the UCC
(such as "general intangibles" and "proceeds") shall have the respective
meanings given such terms in Article 9 of the UCC.

                  (a) "Collateral" means all of the Company's right, title and
interest in and to all of Trademarks, Patents, Copyrights, and other general
intangible property of the Company, all trade secrets, intellectual property
rights in computer software and computer software products, design rights which
may be available to the Company, rights to proceeds arising from any and all
claims for damages by way of past, present and future infringement of any
Collateral with the right but not the obligation to sue on behalf of and
collect such damages for said use or infringement, licenses to use any of the
Copyrights, Patents or Trademarks, and all license fees and royalties arising
from such use to the extent permitted by such license or rights. The term
"Collateral" shall include all of the foregoing items, whether presently owned
or existing or hereafter acquired or coming into existence, all additions and
accessions thereto, all substitutions and replacements thereof, and all
proceeds, products and accounts thereof, including without limitation all
proceeds from the licensing or sale or other transfer of Collateral and of
insurance covering the same and of any tort claims in connection therewith.

                  (b) "Company" shall mean, collectively, DeMarco Energy and
all of the subsidiaries of DeMarco Energy, a list of which is contained in
Schedule A, attached hereto.

                  (c) "Copyrights" means any and all copyrights, copyright
applications, copyright registration and like protections in each work or
authorship and derivative work thereof that is created by the Company, whether
published or unpublished and whether or not the same also constitutes a trade
secret, now or hereafter existing, created, acquired or held, including,
without limitation, those set forth on Exhibit A attached hereto.

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                  (d) "Obligations" means all of the Company's obligations under
this Agreement and the Debentures, in each case, whether now or hereafter
existing, voluntary or involuntary, direct or indirect, absolute or contingent,
liquidated or unliquidated, whether or not jointly owed with others, and whether
or not from time to time decreased or extinguished and later decreased, created
or incurred, and all or any portion of such obligations or liabilities that are
paid, to the extent all or any part of such payment is avoided or recovered
directly or indirectly from the Secured Party as a preference, fraudulent
transfer or otherwise as such obligations may be amended, supplemented,
converted, extended or modified from time to time.

                  (e) "Patents" means all of the Company's patents, patent
applications, letters patent and like protections of the United States or any
other country, including, without limitation, improvements, divisions,
continuations, renewals, reissues, extensions and continuations-in-part of the
same, and including, without limitation, those set forth on Exhibit B attached
hereto.

                  (f) "Trademarks" means any trademark, service mark right,
whether or not registered, applications to register and registrations of the
same and like protections, and the entire goodwill of the business of the
Company connected with or symbolized by such trademarks, including, without
limitation, those set forth on Exhibit C attached hereto.

                  (g) "UCC" means the Uniform Commercial Code, as currently in
effect in the State of Utah.

ARTICLE XXXV Grant of Security Interest. As an inducement for the Secured Party
to purchase the Debentures and to secure the complete and timely payment,
performance and discharge in full, as the case may be, of all of the
Obligations, the Company hereby, unconditionally and irrevocably, pledges,
grants and hypothecates to the Secured Party, a continuing security interest
in, a first lien upon and a right of set-off against all of the Company's
right, title and interest of whatsoever kind and nature in and to the
Collateral (the "Security Interest").

ARTICLE XXXVI Representations, Warranties, Covenants and Agreements of the
Company. The Company represents and warrants to, and covenants and agrees with,
the Secured Party as follows:

         36.1 The Company has the requisite corporate power and authority to
enter into this Agreement and otherwise to carry out its obligations
thereunder. The execution, delivery and performance by the Company of this
Agreement and the filings contemplated therein have been duly authorized by all
necessary action on the part of the Company and no further action is required
by the Company.

         36.2 The Company is the sole owner of the Collateral (except for
non-exclusive licenses granted by the Company in the ordinary course of
business), free and clear of any liens, security interests, encumbrances,
rights or claims, and is fully authorized to grant the Security Interest in and
to pledge the Collateral. There is not on file in any governmental or
regulatory authority, agency or recording office an effective financing
statement, security agreement, license or transfer or any notice of any of the
foregoing (other than those that have been filed in favor of the Secured Party
pursuant to this Agreement) covering or affecting any of the Collateral. So
long as this Agreement shall be in effect, the Company shall not execute and
shall not knowingly permit to be on file in any such office or agency any such
financing statement or other document or instrument (except to the extent filed
or recorded in favor of the Secured Party pursuant to the terms of this
Agreement).

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         36.3 Exhibit A sets forth a true and complete list of all Copyrights
in existence as of the date of this Agreement. Exhibit B sets forth a true and
complete list of all Patents that have been filed as of the date of this
Agreement. Exhibit C sets forth a true and complete list of all Trademarks
filed as of the date of this Agreement. The Company shall, within ten (10) days
of obtaining knowledge thereof, advise the Secured Party in writing of any
change in the composition of the Collateral, including, without limitation, any
subsequent ownership rights of the Company in or to any Copyright, Patent or
Trademark.

         36.4 Each of the Patents, Trademarks and Copyrights is valid and
enforceable, and no part of the Collateral has been judged invalid or
unenforceable. No written claim has been received that any of the Patents,
Trademarks or Copyrights or the Company's use of any Collateral violates the
rights of any third party. There has been no adverse decision to the Company's
claim of ownership rights in or exclusive rights to use the Collateral in any
jurisdiction or to the Company's right to keep and maintain such Collateral in
full force and effect, and there is no proceeding involving said rights pending
or, to the best knowledge of the Company, threatened before any court, judicial
body, administrative or regulatory agency, arbitrator or other governmental
authority.

         36.5 The Company shall at all times maintain its books of account and
records relating to the Collateral at its principal place of business and may
not relocate such books of account and records unless it delivers to the
Secured Party at least 30 days prior to such relocation (i) written notice of
such relocation and the new location thereof (which must be within the United
States) and (ii) evidence that appropriate financing statements and other
necessary documents have been filed and recorded and other steps have been
taken to perfect the Security Interest to create in favor of the Secured Party
valid, perfected and continuing first priority liens in the Collateral. The
principal place of business of the Company is located at the address set forth
in the introduction to this Agreement.

         36.6 This Agreement creates in favor of the Secured Party a valid
security interest in the Collateral, including the Collateral listed on the
Exhibits hereto, securing the payment and performance of the Obligations, and,
upon making the filings described in the immediately following sentence, a
perfected first priority security interest in such Collateral. Except for (x)
the filing of this Agreement with the United States Patent and Trademark Office
with respect to the Patents and Trademarks and the filing of this Agreement
with the Register of Copyrights with respect to the Copyrights, and (y) the
filing of financing statements on Form-1 under the UCC with the jurisdictions
indicated in Schedule B, attached hereto, no authorization or approval of or
filing with or notice to any governmental authority or regulatory body is
required either (i) for the grant by the Company of, or the effectiveness of,
the Security Interest granted hereby or for the execution, delivery and
performance of this Agreement by the Company or (ii) for the perfection of or
exercise by the Secured Party of its rights and remedies hereunder. The Company
acknowledges and agrees that a copy of this Agreement (or instruments executed
and delivered pursuant hereto) will be filed and recorded with each of the
United States Patent and

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Trademark Office and the Register of Copyrights with respect to the Patents,
Trademarks and Copyrights that are now or hereafter in existence.

         36.7 On the date of execution of this Agreement, the Company will
deliver to the Secured Party (i) one or more executed UCC financing statements
on Form-1 with respect to the Security Interest for filing with the
jurisdictions indicated on Schedule B, attached hereto and in such other
jurisdictions as may be requested by the Secured Party and (ii) one or more
executed recordation sheets relating to the filing and recording of this
Agreement with each of the United States Patent and Trademark Office and the
Register of Copyrights with respect to the Patents, Trademarks and Copyrights
that are now in existence.

         36.8 The execution, delivery and performance of this Agreement does
not conflict with or cause a breach or default, or an event that with or
without the passage of time or notice, shall constitute a breach or default,
under any agreement to which the Company is a party or by the Company is bound.
No consent (including, without limitation, from stock holders or creditors of
the Company) is required for the Company to enter into and perform its
obligations hereunder.

         36.9 The Company shall at all times maintain the liens and Security
Interest provided for hereunder as valid and perfected first priority liens and
security interests in the Collateral in favor of the Secured Party until this
Agreement and the Security Interest hereunder shall terminated pursuant to
Section 10. The Company hereby agrees to defend the same against any and all
persons. The Company shall safeguard and protect all Collateral for the account
of the Secured Party. At the request of the Secured Party, the Company will
sign and deliver to the Secured Party at any time or from time to time one or
more financing statements pursuant to the UCC (or any other applicable statute)
in form reasonably satisfactory to the Secured Party and will pay the cost of
filing the same in all public offices wherever filing is, or is deemed by the
Secured Party to be, necessary or desirable to effect the rights and
obligations provided for herein. Without limiting the generality of the
foregoing, the Company shall pay all fees, taxes and other amounts necessary to
maintain the Collateral and the Security Interest hereunder, and the Company
shall obtain and furnish to the Secured Party from time to time, upon demand,
such releases and/or subordinations of claims and liens which may be required
to maintain the priority of the Security Interest hereunder.

         36.10 The Company will not allow any Collateral to be abandoned,
forfeited or dedicated to the public without the prior written consent of the
Secured Party. The Company will not transfer, pledge, hypothecate, encumber,
license (except for non-exclusive licenses granted by the Company in the
ordinary course of business), sell or otherwise dispose of any of the
Collateral in the ordinary course of business without the prior written consent
of the Secured Party.

         36.11 The Company shall, within ten (10) days of obtaining knowledge
thereof, advise the Secured Party promptly, in sufficient detail, of any
substantial change in the Collateral, and of the occurrence of any event which
would have a material adverse effect on the value of the Collateral or on the
Secured Party's security interest therein.

         36.12 The Company shall permit the Secured Party and its
representatives and agents to inspect the Collateral at any time, and to make
copies of records pertaining to the Collateral as may be requested by the
Secured Party from time to time.

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         36.13 The Company will take all steps reasonably necessary to
diligently pursue and seek to preserve, enforce and collect any rights, claims,
causes of action and accounts receivable in respect of the Collateral.

         36.14 The Company shall promptly notify the Secured Party in
sufficient detail upon becoming aware of any attachment, garnishment, execution
or other legal process levied against any Collateral and of any other
information received by the Company that may materially affect the value of the
Collateral, the Security Interest or the rights and remedies of the Secured
Party hereunder.

         36.15 All information heretofore, herein or hereafter supplied to the
Secured Party by or on behalf of the Company with respect to the Collateral is
accurate and complete in all material respects as of the date furnished.

         36.16 Schedule A, attached hereto contains a list of all of the
subsidiaries of DeMarco Energy.

ARTICLE XXXVII Defaults. The following events shall be "Events of Default":

         37.1 The occurrence of an Event of Default (as defined in the
Debentures) under the Debentures;

         37.2 Any representation or warranty of the Company in this Agreement
or in the Security Agreement, dated the date hereof between the Company and the
Secured Party, shall prove to have been incorrect in any material respect when
made; and

         37.3 The failure by the Company to observe or perform any of its
obligations hereunder or in the Security Agreement, dated the date hereof
between the Company and the Secured Party, for ten (10) days after receipt by
the Company of notice of such failure from the Secured Party.

ARTICLE XXXVIII Duty To Hold In Trust. Upon the occurrence of any Event of
Default and at any time thereafter, the Company shall, upon receipt by it of
any revenue, income or other sums subject to the Security Interest, whether
payable pursuant to the Debentures or otherwise, or of any check, draft, note,
trade acceptance or other instrument evidencing an obligation to pay any such
sum, hold the same in trust for the Secured Party and shall forthwith endorse
and transfer any such sums or instruments, or both, to the Secured Party for
application to the satisfaction of the Obligations.

ARTICLE XXXIX Rights and Remedies Upon Default. Upon occurrence of any Event of
Default and at any time thereafter, the Secured Party shall have the right to
exercise all of the remedies conferred hereunder and under the Debentures, and
the Secured Party shall have all the rights and remedies of a secured party
under the UCC and/or any other applicable law (including the Uniform Commercial
Code of any jurisdiction in which any Collateral is then located). Without
limitation, the Secured Party shall have the following rights and powers:

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         39.1 The Secured Party shall have the right to take possession of all
tangible manifestations or embodiments of the Collateral and, for that purpose,
enter, with the aid and assistance of any person, any premises where the
Collateral, or any part thereof, is or may be placed and remove the same, and
the Company shall assemble the Collateral and make it available to the Secured
Party at places which the Secured Party shall reasonably select, whether at the
Company's premises or elsewhere.

         39.2 The Secured Party shall have the right to operate the business of
the Company using the Collateral and shall have the right to assign, sell, or
otherwise dispose of and deliver all or any part of the Collateral, at public
or private sale or otherwise, either with or without special conditions or
stipulations, for cash or on credit or for future delivery, in such parcel or
parcels and at such time or times and at such place or places, and upon such
terms and conditions as the Secured Party may deem commercially reasonable, all
without (except as shall be required by applicable statute and cannot be
waived) advertisement or demand upon or notice to the Company or right of
redemption of the Company, which are hereby expressly waived. Upon each such
sale, assignment or other transfer of Collateral, the Secured Party may, unless
prohibited by applicable law which cannot be waived, purchase all or any part
of the Collateral being sold, free from and discharged of all trusts, claims,
right of redemption and equities of the Company, which are hereby waived and
released.

         39.3 The Secured Party may license or, to the same extent the Company
is permitted by law and contract to do so, sublicense, whether or an exclusive
or non-exclusive basis, any of the Collateral throughout the world for such
term, on such conditions and in such manner as the Secured Party shall, in its
sole discretion, determine.

         39.4 The Secured Party may (without assuming any obligations or
liabilities thereunder), at any time, enforce (and shall have the exclusive
right to enforce) against licensee or sublicensee all rights and remedies of
the Company in, to and under any license agreement with respect to such
Collateral, and take or refrain from taking any action thereunder.

         39.5 The Secured Party may, in order to implement the assignment,
license, sale or other disposition of any of the Collateral pursuant to this
Section, pursuant to the authority provided for in Section 11, execute and
deliver on behalf of the Company one or more instruments of assignment of the
Collateral in form suitable for filing, recording or registration in any
jurisdictions as the Secured Party may determine advisable.

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ARTICLE XL Applications of Proceeds; Expenses. (a) The proceeds of any such
sale, lease, license or other disposition of the Collateral hereunder shall be
applied first, to the expenses of retaking, holding, storing, processing and
preparing for sale, selling, and the like (including, without limitation, any
taxes, fees and other costs incurred in connection therewith) of the
Collateral, to the reasonable attorneys' fees and expenses incurred by the
Secured Party in enforcing its rights hereunder and in connection with
collecting, storing and disposing of the Collateral, and then to satisfaction
of the Obligations, and to the payment of any other amounts required by
applicable law, after which the Secured Party shall pay to the Company any
surplus proceeds. If, upon the sale, license or other disposition of the
Collateral, the proceeds thereof are insufficient to pay all amounts to which
the Secured Party is legally entitled, the Company will be liable for the
deficiency, together with interest thereon, at the rate of 12.5% per annum (the
"Default Rate"), and the reasonable fees of any attorneys employed by the
Secured Party to collect such deficiency. To the extent permitted by applicable
law, the Company waives all claims, damages and demands against the Secured
Party arising out of the repossession, removal, retention or sale of the
Collateral, unless due to the gross negligence or willful misconduct of the
Secured Party.

                  (b) The Company agrees to pay all out-of-pocket fees, costs
and expenses incurred in connection with any filing required hereunder,
including, without limitation, any financing statements, continuation
statements, partial releases and/or termination statements related thereto or
any expenses of any searches reasonably required by the Secured Party. The
Company shall also pay all other claims and charges which in the reasonable
opinion of the Secured Party might prejudice, imperil or otherwise affect the
Collateral or the Security Interest therein. The Company will also, upon
demand, pay to the Secured Party the amount of any and all reasonable expenses,
including the reasonable fees and expenses of its counsel and of any experts
and agents, which the Secured Party may incur in connection with (i) the
enforcement of this Agreement, (ii) the custody or preservation of, or the sale
of, collection from, or other realization upon, any of the Collateral, or (iii)
the exercise or enforcement of any of the rights of the Secured Party under the
Debentures. Until so paid, any fees payable hereunder shall be added to the
principal amount of the Debentures and shall bear interest at the Default Rate.

ARTICLE XLI Responsibility for Collateral. The Company assumes all liabilities
and responsibility in connection with all Collateral, and the obligations of
the Company hereunder or under the Debentures shall in no way be affected or
diminished by reason of the loss, destruction, damage or theft of any of the
Collateral or its unavailability for any reason.

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ARTICLE XLII Security Interest Absolute. All rights of the Secured Party and
all Obligations of the Company hereunder, shall be absolute and unconditional,
irrespective of: (a) any lack of validity or enforceability of this Agreement,
the Debentures or any agreement entered into in connection with the foregoing,
or any portion hereof or thereof; (b) any change in the time, manner or place
of payment or performance of, or in any other term of, all or any of the
Obligations, or any other amendment or waiver of or any consent to any
departure from the Debentures or any other agreement entered into in connection
with the foregoing; (c) any exchange, release or nonperfection of any of the
Collateral, or any release or amendment or waiver of or consent to departure
from any other collateral for, or any guaranty, or any other security, for all
or any of the Obligations; (d) any action by the Secured Party to obtain,
adjust, settle and cancel in its sole discretion any insurance claims or
matters made or arising in connection with the Collateral; or (e) any other
circumstance which might otherwise constitute any legal or equitable defense
available to the Company, or a discharge of all or any part of the Security
Interest granted hereby. Until the Obligations shall have been paid and
performed in full, the rights of the Secured Party shall continue even if the
Obligations are barred for any reason, including, without limitation, the
running of the statute of limitations or bankruptcy. The Company expressly
waives presentment, protest, notice of protest, demand, notice of nonpayment
and demand for performance. In the event that at any time any transfer of any
Collateral or any payment received by the Secured Party hereunder shall be
deemed by final order of a court of competent jurisdiction to have been a
voidable preference or fraudulent conveyance under the bankruptcy or insolvency
laws of the United States, or shall be deemed to be otherwise due to any party
other than the Secured Party, then, in any such event, the Company's
obligations hereunder shall survive cancellation of this Agreement, and shall
not be discharged or satisfied by any prior payment thereof and/or cancellation
of this Agreement, but shall remain a valid and binding obligation enforceable
in accordance with the terms and provisions hereof. The Company waives all
right to require the Secured Party to proceed against any other person or to
apply any Collateral which the Secured Party may hold at any time, or to
marshal assets, or to pursue any other remedy. The Company waives any defense
arising by reason of the application of the statute of limitations to any
obligation secured hereby.

ARTICLE XLIII Term of Agreement. This Agreement and the Security Interest shall
terminate on the date on which all payments under the Debentures have been made
in full and all other Obligations have been paid or discharged. Upon such
termination, the Secured Party, at the request and at the expense of the
Company, will join in executing any termination statement with respect to any
financing statement executed and filed pursuant to this Agreement.

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ARTICLE XLIV Power of Attorney; Further Assurances. (a) The Company authorizes
the Secured Party, and does hereby make, constitute and appoint it, and its
respective officers, agents, successors or assigns with full power of
substitution, as the Company's true and lawful attorney-in-fact, with power, in
its own name or in the name of the Company, to, after the occurrence and during
the continuance of an Event of Default, (i) endorse any notes, checks, drafts,
money orders, or other instruments of payment (including payments payable under
or in respect of any policy of insurance) in respect of the Collateral that may
come into possession of the Secured Party; (ii) to sign and endorse any UCC
financing statement or any invoice, freight or express bill, bill of lading,
storage or warehouse receipts, drafts against debtors, assignments,
verifications and notices in connection with accounts, and other documents
relating to the Collateral; (iii) to pay or discharge taxes, liens, security
interests or other encumbrances at any time levied or placed on or threatened
against the Collateral; (iv) to demand, collect, receipt for, compromise,
settle and sue for monies due in respect of the Collateral; and (v) generally,
to do, at the option of the Secured Party, and at the Company's expense, at any
time, or from time to time, all acts and things which the Secured Party deems
necessary to protect, preserve and realize upon the Collateral and the Security
Interest granted therein in order to effect the intent of this Agreement and
the Debentures, all as fully and effectually as the Company might or could do;
and the Company hereby ratifies all that said attorney shall lawfully do or
cause to be done by virtue hereof. This power of attorney is coupled with an
interest and shall be irrevocable for the term of this Agreement and thereafter
as long as any of the Obligations shall be outstanding.

                  (b) On a continuing basis, the Company will make, execute,
acknowledge, deliver, file and record, as the case may be, in the proper filing
and recording places in any jurisdiction, including, without limitation, the
jurisdictions indicated on Schedule B, attached hereto, all such instruments,
including appropriate financing and continuation statements and collateral
agreements and filings with the United States Patent and Trademark Office and
the Register of Copyrights, and take all such action as may reasonably be
deemed necessary or advisable, or as reasonably requested by the Secured Party,
to perfect the Security Interest granted hereunder and otherwise to carry out
the intent and purposes of this Agreement, or for assuring and confirming to
the Secured Party the grant or perfection of a security interest in all the
Collateral.

                  (c) The Company hereby irrevocably appoints the Secured Party
as the Company's attorney-in-fact, with full authority in the place and stead
of the Company and in the name of the Company, from time to time in the Secured
Party's discretion, to take any action and to execute any instrument which the
Secured Party may deem necessary or advisable to accomplish the purposes of
this Agreement, including:

                      (i) To modify, in its sole discretion, this Agreement
without first obtaining the Company's approval of or signature to such
modification by amending Exhibit A, Exhibit B and Exhibit C, hereof, as
appropriate, to include reference to any right, title or interest in any
Copyrights, Patents or Trademarks acquired by the Company after the execution
hereof or to delete any reference to any right, title or interest in any
Copyrights, Patents or Trademarks in which the Company no longer has or claims
any right, title or interest; and

                      (ii) To file, in its sole discretion, one or more
financing or continuation statements and amendments thereto, relative to any of
the Collateral without the signature of the Company where permitted by law.

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ARTICLE XLV Notices. All notices, requests, demands and other communications
hereunder shall be in writing, with copies to all the other parties hereto, and
shall be deemed to have been duly given when (i) if delivered by hand, upon
receipt, (ii) if sent by facsimile, upon receipt of proof of sending thereof,
(iii) if sent by nationally recognized overnight delivery service (receipt
requested), the next business day or (iv) if mailed by first-class registered
or certified mail, return receipt requested, postage prepaid, four days after
posting in the U.S. mails, in each case if delivered to the following
addresses:

      If to the Company:                 DeMarco Energy Systems of America
                                         12885 HWY183, STE 108-A
                                         Austin, Texas
                                         Facsimile No.: (512) 335-6380
                                         Attn: Chief Financial Officer

      With copies to:            Locke Liddell & Sapp LLP100 Congress Avenue
                                         Suite 300 Austin, Texas 78701
                                         Facsimile No.: (512) 305-4700
                                         Attn: Curtis Ashmos, Esq.

      If to the Secured Party:   AJW Partners, LLC
                                         155 First Street, Suite B
                                         Mineola, NY 11501
                                         Facsimile No.: (516) 739-7115
                                         Attn: Corey S. Ribotsky

                                                  and

                                         New Millennium Capital Partners II, LLC
                                         155 First Street, Suite B
                                         Mineola,  NY 11501
                                         Facsimile No.: (516) 739-7115
                                         Attn: Glenn A. Arbeitman

      With copies to:            Robinson Silverman Pearce Aronsohn &
                                             Berman LLP
                                         1290 Avenue of the Americas
                                         New York, NY  10104
                                         Facsimile No.: (212) 541-4630
                                         Attn: Eric L. Cohen. Esq.

ARTICLE XLVI Other Security. To the extent that the Obligations are now or
hereafter secured by property other than the Collateral or by the guarantee,
endorsement or property of any other person, firm, corporation or other entity,
then the Secured Party shall have the right, in its sole discretion, to pursue,
relinquish, subordinate, modify or take any other action with respect thereto,
without in any way modifying or affecting any of the Secured Party's rights and
remedies hereunder.

ARTICLE XLVII Miscellaneous.

         47.1 No course of dealing between the Company and the Secured Party,
nor any failure to exercise, nor any delay in exercising, on the part of the
Secured Party, any right, power or

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privilege hereunder or under the Debentures shall operate as a waiver thereof;
nor shall any single or partial exercise of any right, power or privilege
hereunder or thereunder preclude any other or further exercise thereof or the
exercise of any other right, power or privilege. 47.2 All of the rights and
remedies of the Secured Party with respect to the Collateral, whether
established hereby or by the Debentures or by any other agreements, instruments
or documents or by law shall be cumulative and may be exercised singly or
concurrently.

         47.3 This Agreement constitutes the entire agreement of the parties
with respect to the subject matter hereof and is intended to supersede all
prior negotiations, understandings and agreements with respect thereto. Except
as specifically set forth in this Agreement, no provision of this Agreement may
be modified or amended except by a written agreement specifically referring to
this Agreement and signed by the parties hereto.

         47.4 In the event that any provision of this Agreement is held to be
invalid, prohibited or unenforceable in any jurisdiction for any reason, unless
such provision is narrowed by judicial construction, this Agreement shall, as
to such jurisdiction, be construed as if such invalid, prohibited or
unenforceable provision had been more narrowly drawn so as not to be invalid,
prohibited or unenforceable. If, notwithstanding the foregoing, any provision
of this Agreement is held to be invalid, prohibited or unenforceable in any
jurisdiction, such provision, as to such jurisdiction, shall be ineffective to
the extent of such invalidity, prohibition or unenforceability without
invalidating the remaining portion of such provision or the other provisions of
this Agreement and without affecting the validity or enforceability of such
provision or the other provisions of this Agreement in any other jurisdiction.

         47.5 No waiver of any breach or default or any right under this
Agreement shall be considered valid unless in writing and signed by the party
giving such waiver, and no such waiver shall be deemed a waiver of any
subsequent breach or default or right, whether of the same or similar nature or
otherwise.

         47.6 This Agreement shall be binding upon and inure to the benefit of
each party hereto and its successors and assigns.

         47.7 Each party shall take such further action and execute and deliver
such further documents as may be necessary or appropriate in order to carry out
the provisions and purposes of this Agreement.

         47.8 This Agreement shall be construed in accordance with the laws of
the State of New York, except to the extent the validity, perfection or
enforcement of a security interest hereunder in respect of any particular
Collateral which are governed by a jurisdiction other than the State of New
York in which case such law shall govern. Each of the parties hereto
irrevocably submit to the exclusive jurisdiction of any New York State or
United States Federal court sitting in Manhattan county over any action or
proceeding arising out of or relating to this Agreement, and the parties hereto
hereby irrevocably agree that all claims in respect of such action or
proceeding may be heard and determined in such New York State or Federal court.
The parties hereto agree that a final judgment in any such action or proceeding
shall be

                                     -11-
<PAGE>   12

conclusive and may be enforced in other jurisdictions by suit on the judgment
or in any other manner provided by law. The parties hereto further waive any
objection to venue in the State of New York and any objection to an action or
proceeding in the State of New York on the basis of forum non convenient.

         47.9 EACH PARTY HERETO HEREBY AGREES TO WAIVE ITS RESPECTIVE RIGHTS TO
A JURY TRIAL OF ANY CLAIM OR CAUSE OF ACTION BASED UPON OR ARISING OUT OF THIS
AGREEMENT. THE SCOPE OF THIS WAIVER IS INTENDED TO BE ALL ENCOMPASSING OF ANY
DISPUTES THAT MAY BE FILED IN ANY COURT AND THAT RELATE TO THE SUBJECT MATER OF
THIS AGREEMENT, INCLUDING WITHOUT LIMITATION CONTRACT CLAIMS, TORT CLAIMS,
BREACH OF DUTY CLAIMS AND ALL OTHER COMMON LAW AND STATUTORY CLAIMS. EACH PARTY
HERETO ACKNOWLEDGES THAT THIS WAIVER IS A MATERIAL INDUCEMENT FOR EACH PARTY TO
ENTER INTO A BUSINESS RELATIONSHIP, THAT EACH PARTY HAS ALREADY RELIED ON THIS
WAIVER IN ENTERING INTO THIS AGREEMENT AND THAT EACH PARTY WILL CONTINUE TO
RELY ON THIS WAIVER IN THEIR RELATED FUTURE DEALINGS. EACH PARTY FURTHER
WARRANTS AND REPRESENTS THAT IT HAS REVIEWED THIS WAIVER WITH ITS LEGAL
COUNSEL, AND THAT SUCH PARTY HAS KNOWINGLY AND VOLUNTARILY WAIVES ITS RIGHTS TO
A JURY TRIAL FOLLOWING SUCH CONSULTATION. THIS WAIVER IS IRREVOCABLE, MEANING
THAT, NOTWITHSTANDING ANYTHING HEREIN TO THE CONTRARY, IT MAY NOT BE MODIFIED
EITHER ORALLY OR IN WRITING, AND THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT
AMENDMENTS, RENEWALS AND SUPPLEMENTS OR MODIFICATIONS TO THIS AGREEMENT. IN THE
EVENT OF A LITIGATION, THIS AGREEMENT MAY BE FILED AS A WRITTEN CONSENT TO A
TRIAL BY THE COURT.

         47.10 This Agreement may be executed in any number of counterparts,
each of which when so executed shall be deemed to be an original and, all of
which taken together shall constitute one and the same Agreement. In the event
that any signature is delivered by facsimile transmission, such signature shall
create a valid binding obligation of the party executing (or on whose behalf
such signature is executed) the same with the same force and effect as if such
facsimile signature were the original thereof.

                             * * * * * * * * * * *

                                     -12-
<PAGE>   13

                  IN WITNESS WHEREOF, the parties hereto have caused this
Intellectual Property Security Agreement to be duly executed on the day and
year first above written.

                       DEMARCO ENERGY SYSTEMS OF AMERICA

                       By:
                           -------------------------------------------------
                           Name:
                           Title:

                       AJW PARTNERS, LLC
                       By: SMS Group, LLC

                       By:
                           -------------------------------------------------
                           Name: Corey S. Ribotsky
                           Title:

                        NEW MILLENNIUM CAPITAL PARTNERS II, LLC
                        By: First Street Manager II, LLC

                        By:
                           -------------------------------------------------
                           Name: Glenn A. Arbeitman
                           Title:

                                     -13-
<PAGE>   14

EXHIBIT A

Copyrights

Description                    Registration              Registration
                                 Number                      Date

                                     -14-
<PAGE>   15

EXHIBIT B

Patents

Description                    Registration              Registration
                                 Number                      Date

                                     -15-
<PAGE>   16

EXHIBIT C

Trademarks

Description                    Registration              Registration
                                 Number                      Date

                                     -16-
<PAGE>   17

SCHEDULE A

List of subsidiaries of the Company:

                                     -17-          Registration Rights Agreement

<PAGE>   18

SCHEDULE B

Jurisdictions:

                                     -18-          Registration Rights Agreement<PAGE>   1
                                                                    EXHIBIT 4.05

REGISTRATION RIGHTS AGREEMENT

          This Registration Rights Agreement (this "Agreement") is made and
entered into as of September 26, 2000, among DeMarco Energy Systems of America,
Inc., a Utah corporation (the "Company"), and the investors signatory hereto
(each such investor is a "Purchaser" and all such investors are, collectively,
the "Purchasers").

          This Agreement is made pursuant to the Secured Convertible Debenture
Purchase Agreement, dated as of the date hereof among the Company and the
Purchasers (the "Purchase Agreement").

          The Company and the Purchasers hereby agree as follows:

ARTICLE XLVIII Definitions

          Capitalized terms used and not otherwise defined herein that are
defined in the Purchase Agreement shall have the meanings given such terms in
the Purchase Agreement. As used in this Agreement, the following terms shall
have the following meanings:

          "Affiliate" means, with respect to any Person, any other Person that
directly or indirectly controls or is controlled by or under common control with
such Person. For the purposes of this definition, "control," when used with
respect to any Person, means the possession, direct or indirect, of the power to
direct or cause the direction of the management and policies of such Person,
whether through the ownership of voting securities, by contract or otherwise;
and the terms of "affiliated," "controlling" and "controlled" have meanings
correlative to the foregoing.

          "Business Day" means any day except Saturday, Sunday and any day which
shall be a legal holiday or a day on which banking institutions in the State of
New York or Utah generally are authorized or required by law or other government
actions to close.

          "Closing Date" shall have the meaning set forth in the Purchase
Agreement.

          "Commission" means the Securities and Exchange Commission.

          "Common Stock" means the Company's common stock, $.001 par value, or
such securities in to which that such stock shall hereafter be reclassified.

          "Debentures" means the Convertible Debentures issued to the Purchasers
in accordance with the Purchase Agreement.

          "Effectiveness Date" means with respect to the initial Registration
Statement required to be filed hereunder, the 90th day following the Closing
Date and, with respect to any additional Registration Statements which may be
required pursuant to Section 3(c), the 90th day following the date that notice
of the requirement to file such additional Registration Statement is provided.

          "Effectiveness Period" shall have the meaning set forth in Section
2(a).

          "Exchange Act" means the Securities Exchange Act of 1934, as amended.

          "Filing Date" means the 45th day following the Closing Date and, with
respect to any additional Registration Statements which may be required pursuant
to Section 3(c), the 45th day following the date that notice of the requirement
to be file such additional Registration Statement is provided.

                                                   Registration Rights Agreement

<PAGE>   2

          "Holder" or "Holders" means the holder or holders, as the case may be,
from time to time of Registrable Securities.

          "Indemnified Party" shall have the meaning set forth in Section 5(c).

          "Indemnifying Party" shall have the meaning set forth in Section 5(c).

          "Losses" shall have the meaning set forth in Section 5(a).

          "Person" means an individual or a corporation, partnership, trust,
incorporated or unincorporated association, joint venture, limited liability
company, joint stock company, government (or an agency or political subdivision
thereof) or other entity of any kind.

          "Proceeding" means an action, claim, suit, investigation or proceeding
(including, without limitation, an investigation or partial proceeding, such as
a deposition), whether commenced or threatened.

          "Prospectus" means the prospectus included in the Registration
Statement (including, without limitation, a prospectus that includes any
information previously omitted from a prospectus filed as part of an effective
registration statement in reliance upon Rule 430A promulgated under the
Securities Act), as amended or supplemented by any prospectus supplement, with
respect to the terms of the offering of any portion of the Registrable
Securities covered by the Registration Statement, and all other amendments and
supplements to the Prospectus, including post-effective amendments, and all
material incorporated by reference or deemed to be incorporated by reference in
such Prospectus.

          "Registrable Securities" means (i) the Shares and (ii) the shares of
Common Stock issuable upon conversion in full of the Debentures.

          "Registration Statement" means the registration statement and any
additional registration statements contemplated by Section 3(c), including (in
each case) the Prospectus, amendments and supplements to such registration
statement or Prospectus, including pre- and post-effective amendments, all
exhibits thereto, and all material incorporated by reference or deemed to be
incorporated by reference in such registration statement.

          "Rule 144" means Rule 144 promulgated by the Commission pursuant to
the Securities Act, as such Rule may be amended from time to time, or any
similar rule or regulation hereafter adopted by the Commission having
substantially the same effect as such Rule.

          "Rule 415" means Rule 415 promulgated by the Commission pursuant to
the Securities Act, as such Rule may be amended from time to time, or any
similar rule or regulation hereafter adopted by the Commission having
substantially the same effect as such Rule.

          "Rule 424" means Rule 424 promulgated by the Commission pursuant to
the Securities Act, as such Rule may be amended from time to time, or any
similar rule or regulation hereafter adopted by the Commission having
substantially the same effect as such Rule.

          "Securities Act" means the Securities Act of 1933, as amended, and the
rules and regulations promulgated thereunder.

          "Shares" means the shares of Common Stock issued and sold to the
Purchasers pursuant to the Purchase Agreement.

          "Special Counsel" means one special counsel to the Holders, for which
the Holders will be reimbursed by the Company pursuant to Section 4.

                                       -2-         Registration Rights Agreement
<PAGE>   3

ARTICLE XLIX Shelf Registration

     49.1 On or prior to each Filing Date, the Company shall prepare and file
with the Commission a "Shelf" Registration Statement covering the resale of all
Registrable Securities for an offering to be made on a continuous basis pursuant
to Rule 415. The Registration Statement shall be on Form SB-2 (except if the
Company is not then eligible to register for resale the Registrable Securities
on Form SB-2, in which case such registration shall be on another appropriate
form and shall contain (except if otherwise directed by the Holders) the "Plan
of Distribution" attached hereto as Annex A. The Company shall use its best
efforts to cause the Registration Statement to be declared effective under the
Securities Act as promptly as possible after the filing thereof, but in any
event prior to the Effectiveness Date, and shall use its best efforts to keep
such Registration Statement continuously effective under the Securities Act
until the date which is two years after the date that such Registration
Statement is declared effective by the Commission or such earlier date when all
Registrable Securities covered by such Registration Statement have been sold or
may be sold without volume restrictions pursuant to Rule 144(k) (the
"Effectiveness Period").

     49.2 The initial Registration Statement to be filed hereunder shall include
(but not be limited to) a number of shares of Common Stock equal to no less than
the sum of 200% of the number of shares of Common Stock issuable upon conversion
in full of the principal amount of Debentures issued on such Closing Date,
assuming no interest is paid thereon in cash and that such Debentures remain
outstanding for one year and that such conversion occurred at a price equal to
the lesser of (a) $0.34 and (b) 60% of the average of the lowest three inter-day
prices (which need not occur on consecutive Trading Days) during the ten Trading
Days immediately preceding the Closing Date.

     49.3 If (a) a Registration Statement is not filed on or prior to its Filing
Date (if the Company files such Registration Statement without affording the
Holder the opportunity to review and comment on the same as required by Section
3(a) hereof, the Company shall not be deemed to have satisfied this clause (a)),
or (b) the Company fails to file with the Commission a request for acceleration
in accordance with Rule 461 promulgated under the Securities Act, within five
days of the date that the Company is notified (orally or in writing, whichever
is earlier) by the Commission that a Registration Statement will not be
"reviewed," or not subject to further review, or (c) a Registration Statement
filed hereunder is not declared effective by the Commission on or prior to the
sixtieth (60) day following the Effectiveness Date, or (d) after a Registration
Statement is filed with and declared effective by the Commission, such
Registration Statement ceases to be effective as to all Registrable Securities
to which it is required to relate at any time prior to the expiration of the
Effectiveness Period without being succeeded within ten Business Days by an
amendment to such Registration Statement or by a subsequent Registration
Statement filed with and declared effective by the Commission, or (e) the Common
Stock shall not be quoted on the OTC Bulletin Board or shall be delisted or
suspended from trading on the New York Stock Exchange, American Stock Exchange,
the Nasdaq National Market or the Nasdaq Smallcap Market (each, a "Subsequent
Market") for more than three Trading Days (which need not be consecutive Trading
Days), or (f) the conversion rights of the Holders pursuant to the Debentures
are suspended for any reason, or (g) an amendment to a Registration Statement is
not filed by the Company with the Commission within ten Business Days of the
Commission's notifying the Company that such amendment is required in order for
such Registration Statement to be declared effective (any such failure or breach
being referred to as an

                                       -3-         Registration Rights Agreement
<PAGE>   4

"Event," and for purposes of clauses (a), (c), (f) the date on which such Event
occurs, or for purposes of clause (b) the date on which such five day period is
exceeded, or for purposes of clauses (d) and (g) the date which such ten
Business Day-period is exceeded, or for purposes of clause (e) the date on which
such three Trading Day-period is exceeded, being referred to as "Event Date"),
then, on each such Event Date and every monthly anniversary thereof until the
applicable Event is cured, the Company shall pay to each Holder an amount in
cash, as liquidated damages and not as a penalty, equal to 2.0% of the purchase
price paid by such Holder pursuant to the Purchase Agreement, in cash or at the
Holder's option, in shares of Common Stock. If the Holder elects to receive such
liquidated damages in shares of Common Stock, then the number of shares issuable
to such Holder shall be determined based upon a price which is equal to the
average of the three lowest inter-day trading prices (as reported by Bloomberg
Information Services) during the ten Trading Days immediately preceding the
Event Date or the monthly anniversary thereof. If the Company fails to pay any
liquidated damages pursuant to this Section in full within seven days after the
date payable, the Company will pay interest thereon at a rate of 12.5% per annum
(or such lesser maximum amount that is permitted to be paid by applicable law)
to the Holder, accruing daily from the date such liquidated damages are due
until such amounts, plus all such interest thereon, are paid in full. The
liquidated damages pursuant to the terms hereof shall apply on a pro-rata basis
for any portion of a month prior to the cure of an Event.

ARTICLE L Registration Procedures

          In connection with the Company's registration obligations hereunder,
the Company shall:

     50.1 Not less than five Business Days prior to the filing of each
Registration Statement or any related Prospectus or any amendment or supplement
thereto (including any document that would be incorporated or deemed to be
incorporated therein by reference), the Company shall, (i) furnish to the
Holders and their Special Counsel copies of all such documents proposed to be
filed, which documents (other than those incorporated or deemed to be
incorporated by reference) will be subject to the review of such Holders and
their Special Counsel, and (ii) cause its officers and directors, counsel and
independent certified public accountants to respond to such inquiries as shall
be necessary, in the reasonable opinion of respective counsel to conduct a
reasonable investigation within the meaning of the Securities Act. The Company
shall not file the Registration Statement or any such Prospectus or any
amendments or supplements thereto to which the Holders of a majority of the
Registrable Securities and their Special Counsel shall reasonably object,
provided, the Company is notified of such objection no later than 3 Business
Days after the Holders have been so furnished copies of such documents.
Notwithstanding anything to the contrary contained herein, the parties agree
that if (1) the Holders or their Special Counsel shall fail to provide comments
to the Company or their counsel to a proposed Registration Statement by the
expiration of the fifth Business Day following the date on which they received
the same for review, or (2) the Holders or their Special Counsel shall fail to
provide comments to the Company or its counsel to a proposed amendment or
supplement to a Registration Statement hereunder by the expiration of the second
Business Day following the date on which they receive the same for review, then
a number of days equal to the number of Business Days in excess of such periods
shall be added to the definitions of Filing Date and Effectiveness Date for
purposes of Section 2(a) and Section 2(c) hereof.

                                       -4-         Registration Rights Agreement
<PAGE>   5

     50.2 (i) Prepare and file with the Commission such amendments, including
post-effective amendments, to the Registration Statement and the Prospectus used
in connection therewith as may be necessary to keep the Registration Statement
continuously effective as to the applicable Registrable Securities for the
Effectiveness Period and prepare and file with the Commission such additional
Registration Statements in order to register for resale under the Securities Act
all of the Registrable Securities; (ii) cause the related Prospectus to be
amended or supplemented by any required Prospectus supplement, and as so
supplemented or amended to be filed pursuant to Rule 424; (iii) respond as
promptly as reasonably possible, and in any event within ten Business Days, to
any comments received from the Commission with respect to the Registration
Statement or any amendment thereto and as promptly as reasonably possible
provide the Holders true and complete copies of all correspondence from and to
the Commission relating to the Registration Statement; and (iv) comply in all
material respects with the provisions of the Securities Act and the Exchange Act
with respect to the disposition of all Registrable Securities covered by the
Registration Statement during the applicable period in accordance with the
intended methods of disposition by the Holders thereof set forth in the
Registration Statement as so amended or in such Prospectus as so supplemented.

     50.3 File additional Registration Statements if the number of Registrable
Securities at any time exceeds 85% of the number of shares of Common Stock then
registered in all their existing Registration Statements hereunder.

     50.4 Notify the Holders of Registrable Securities to be sold and their
Special Counsel as promptly as reasonably possible (and, in the case of (i)(A)
below, not less than five Business Days prior to such filing) and (if requested
by any such Person) confirm such notice in writing no later than one Business
Day following the day (i)(A) when a Prospectus or any Prospectus supplement or
post-effective amendment to the Registration Statement is proposed to be filed;
(B) when the Commission notifies the Company whether there will be a "review" of
such Registration Statement and whenever the Commission comments in writing on
such Registration Statement (the Company shall provide true and complete copies
thereof and all written responses thereto to each of the Holders); and (C) with
respect to the Registration Statement or any post-effective amendment, when the
same has become effective; (ii) of any request by the Commission or any other
Federal or state governmental authority for amendments or supplements to the
Registration Statement or Prospectus or for additional information; (iii) of the
issuance by the Commission of any stop order suspending the effectiveness of the
Registration Statement covering any or all of the Registrable Securities or the
initiation of any Proceedings for that purpose; (iv) if at any time any of the
representations and warranties of the Company contained in any agreement
contemplated hereby ceases to be true and correct in all material respects; (v)
of the receipt by the Company of any notification with respect to the suspension
of the qualification or exemption from qualification of any of the Registrable
Securities for sale in any jurisdiction, or the initiation or threatening of any
Proceeding for such purpose; and (vi) of the occurrence of any event or passage
of time that makes the financial statements included in the Registration
Statement ineligible for inclusion therein or any statement made in the
Registration Statement or Prospectus or any document incorporated or deemed to
be incorporated therein by reference untrue in any material respect or that
requires any revisions to the Registration Statement, Prospectus or other
documents so that, in the case of the Registration Statement or the Prospectus,
as the case may be, it will not contain any untrue statement of a

                                       -5-         Registration Rights Agreement
<PAGE>   6

material fact or omit to state any material fact required to be stated therein
or necessary to make the statements therein, in light of the circumstances under
which they were made, not misleading.

     50.5 Promptly deliver to each Holder and their Special Counsel, without
charge, as many copies of the Prospectus or Prospectuses (including each form of
prospectus) and each amendment or supplement thereto as such Persons may
reasonably request. The Company hereby consents to the use of such Prospectus
and each amendment or supplement thereto by each of the selling Holders in
connection with the offering and sale of the Registrable Securities covered by
such Prospectus and any amendment or supplement thereto.

     50.6 Prior to any public offering of Registrable Securities, use its best
efforts to register or qualify or cooperate with the selling Holders and their
Special Counsel in connection with the registration or qualification (or
exemption from such registration or qualification) of such Registrable
Securities for offer and sale under the securities or Blue Sky laws of such
jurisdictions within the United States as any Holder requests in writing, to
keep each such registration or qualification (or exemption therefrom) effective
during the Effectiveness Period and to do any and all other acts or things
necessary or advisable to enable the disposition in such jurisdictions of the
Registrable Securities covered by a Registration Statement; provided, that the
Company shall not be required to qualify generally to do business in any
jurisdiction where it is not then so qualified or subject the Company to any
material tax in any such jurisdiction where it is not then so subject.

     50.7 Cooperate with the Holders to facilitate the timely preparation and
delivery of certificates representing Registrable Securities to be delivered to
a transferee pursuant to a Registration Statement, which certificates shall be
free, to the extent permitted by the Purchase Agreement, of all restrictive
legends, and to enable such Registrable Securities to be in such denominations
and registered in such names as any such Holders may request.

     50.8 Upon the occurrence of any event contemplated by Section 3(d)(vi), as
promptly as reasonably possible, prepare a supplement or amendment, including a
post-effective amendment, to the Registration Statement or a supplement to the
related Prospectus or any document incorporated or deemed to be incorporated
therein by reference, and file any other required document so that, as
thereafter delivered, neither the Registration Statement nor such Prospectus
will contain an untrue statement of a material fact or omit to state a material
fact required to be stated therein or necessary to make the statements therein,
in light of the circumstances under which they were made, not misleading.

     50.9 Comply with all applicable rules and regulations of the Commission.

                                       -6-         Registration Rights Agreement
<PAGE>   7

ARTICLE LI Registration Expenses. All fees and expenses incident to the
performance of or compliance with this Agreement by the Company shall be borne
by the Company whether or not any Registrable Securities are sold pursuant to
the Registration Statement. The fees and expenses referred to in the foregoing
sentence shall include, without limitation, (i) all registration and filing fees
(including, without limitation, fees and expenses (A) with respect to filings
required to be made with any Subsequent Market on which the Common Stock is then
listed for trading, and (B) in compliance with applicable state securities or
Blue Sky laws (including, without limitation, fees and disbursements of counsel
for the Company in connection with Blue Sky qualifications or exemptions of the
Registrable Securities and determination of the eligibility of the Registrable
Securities for investment under the laws of such jurisdictions as requested by
the Holders)), (ii) printing expenses (including, without limitation, expenses
of printing certificates for Registrable Securities and of printing prospectuses
requested by the Holders), (iii) messenger, telephone and delivery expenses,
(iv) fees and disbursements of counsel for the Company and Special Counsel for
the Holders and (v) fees and expenses of all other Persons retained by the
Company in connection with the consummation of the transactions contemplated by
this Agreement.

ARTICLE LII Indemnification

     52.1 Indemnification by the Company. The Company shall, notwithstanding any
termination of this Agreement, indemnify and hold harmless each Holder, the
officers, directors, agents, brokers (including brokers who offer and sell
Registrable Securities as principal as a result of a pledge or any failure to
perform under a margin call of Common Stock), investment advisors and employees
of each of them, each Person who controls any such Holder (within the meaning of
Section 15 of the Securities Act or Section 20 of the Exchange Act) and the
officers, directors, agents and employees of each such controlling Person, to
the fullest extent permitted by applicable law, from and against any and all
losses, claims, damages, liabilities, costs (including as determined by a court
of competent jurisdiction in a final judgment not subject to appeal or review,
without limitation, costs of preparation and attorneys' fees) and expenses
(collectively, "Losses"), as incurred, arising out of or relating to any untrue
or alleged untrue statement of a material fact contained in the Registration
Statement, any Prospectus or any form of prospectus or in any amendment or
supplement thereto or in any preliminary prospectus, or arising out of or
relating to any omission or alleged omission of a material fact required to be
stated therein or necessary to make the statements therein (in the case of any
Prospectus or form of prospectus or supplement thereto, in light of the
circumstances under which they were made) not misleading, except to the extent,
but only to the extent, that (1) such untrue statements or omissions are based
solely upon information regarding such Holder furnished in writing to the
Company by such Holder expressly for use therein, or to the extent that such
information relates to such Holder or such Holder's proposed method of
distribution of Registrable Securities and was reviewed and expressly approved
in writing by such Holder expressly for use in the Registration Statement, such
Prospectus or such form of Prospectus or in any amendment or supplement thereto
or (2) in the case of an occurrence of an event of the type specified in Section
3(d)(ii)-(vi), the use by such Holder of an outdated or defective Prospectus
after the Company has notified such Holder in writing that the Prospectus is
outdated or defective and prior to the receipt by such Holder of the Advice
contemplated in Section 6(e). The Company shall notify

                                       -7-         Registration Rights Agreement
<PAGE>   8

the Holders promptly of the institution, threat or assertion of any Proceeding
of which the Company is aware in connection with the transactions contemplated
by this Agreement.

     52.2 Indemnification by Holders. Each Holder shall, severally and not
jointly, indemnify and hold harmless the Company, its directors, officers,
agents and employees, each Person who controls the Company (within the meaning
of Section 15 of the Securities Act and Section 20 of the Exchange Act), and the
directors, officers, agents or employees of such controlling Persons, to the
fullest extent permitted by applicable law, from and against all Losses (as
determined by a court of competent jurisdiction in a final judgment not subject
to appeal or review) arising solely out of or based solely upon any untrue
statement of a material fact contained in any Registration Statement, any
Prospectus, or any form of prospectus, or in any amendment or supplement
thereto, or arising solely out of or based solely upon any omission of a
material fact required to be stated therein or necessary to make the statements
therein not misleading to the extent, but only to the extent, that such untrue
statement or omission is contained in any information so furnished in writing by
such Holder to the Company specifically for inclusion in such Registration
Statement or such Prospectus or to the extent that (1) such untrue statements or
omissions are based solely upon information regarding such Holder furnished in
writing to the Company by such Holder expressly for use therein, or to the
extent that such information relates to such Holder or such Holder's proposed
method of distribution of Registrable Securities and was reviewed and expressly
approved in writing by such Holder expressly for use in the Registration
Statement, such Prospectus or such form of Prospectus or in any amendment or
supplement thereto or (2) in the case of an occurrence of an event of the type
specified in Section 3(d)(ii)-(vi), the use by such Holder of an outdated or
defective Prospectus after the Company has notified such Holder in writing that
the Prospectus is outdated or defective and prior to the receipt by such Holder
of the Advice contemplated in Section 6(e). In no event shall the liability of
any selling Holder hereunder be greater in amount than the dollar amount of the
net proceeds received by such Holder upon the sale of the Registrable Securities
giving rise to such indemnification obligation.

     52.3 Conduct of Indemnification Proceedings. If any Proceeding shall be
brought or asserted against any Person entitled to indemnity hereunder (an
"Indemnified Party"), such Indemnified Party shall promptly notify the Person
from whom indemnity is sought (the "Indemnifying Party") in writing, and the
Indemnifying Party shall assume the defense thereof, including the employment of
counsel reasonably satisfactory to the Indemnified Party and the payment of all
fees and expenses incurred in connection with defense thereof; provided, that
the failure of any Indemnified Party to give such notice shall not relieve the
Indemnifying Party of its obligations or liabilities pursuant to this Agreement,
except (and only) to the extent that it shall be finally determined by a court
of competent jurisdiction (which determination is not subject to appeal or
further review) that such failure shall have proximately and materially
adversely prejudiced the Indemnifying Party.

          An Indemnified Party shall have the right to employ separate counsel
in any such Proceeding and to participate in the defense thereof, but the fees
and expenses of such counsel shall be at the expense of such Indemnified Party
or Parties unless: (1) the Indemnifying Party has agreed in writing to pay such
fees and expenses; or (2) the Indemnifying Party shall have failed promptly to
assume the defense of such Proceeding and to employ counsel reasonably
satisfactory to such Indemnified Party in any such Proceeding; or (3) the named
parties to any such Proceeding (including any impleaded parties) include both
such Indemnified Party and the Indemnifying Party, and such Indemnified Party
shall have been advised by counsel that a conflict of interest is likely to
exist if the same

                                       -8-         Registration Rights Agreement
<PAGE>   9

counsel were to represent such Indemnified Party and the Indemnifying Party (in
which case, if such Indemnified Party notifies the Indemnifying Party in writing
that it elects to employ separate counsel at the expense of the Indemnifying
Party, the Indemnifying Party shall not have the right to assume the defense
thereof and such counsel shall be at the expense of the Indemnifying Party). The
Indemnifying Party shall not be liable for any settlement of any such Proceeding
effected without its written consent, which consent shall not be unreasonably
withheld. No Indemnifying Party shall, without the prior written consent of the
Indemnified Party, effect any settlement of any pending Proceeding in respect of
which any Indemnified Party is a party, unless such settlement includes an
unconditional release of such Indemnified Party from all liability on claims
that are the subject matter of such Proceeding.

          All fees and expenses of the Indemnified Party (including reasonable
fees and expenses to the extent incurred in connection with investigating or
preparing to defend such Proceeding in a manner not inconsistent with this
Section) shall be paid to the Indemnified Party, as incurred, within ten
Business Days of written notice thereof to the Indemnifying Party (regardless of
whether it is ultimately determined that an Indemnified Party is not entitled to
indemnification hereunder; provided, that the Indemnifying Party may require
such Indemnified Party to undertake to reimburse all such fees and expenses to
the extent it is finally judicially determined that such Indemnified Party is
not entitled to indemnification hereunder).

     52.4 Contribution. If a claim for indemnification under Section 5(a) or
5(b) is unavailable to an Indemnified Party (by reason of public policy or
otherwise), then each Indemnifying Party, in lieu of indemnifying such
Indemnified Party, shall contribute to the amount paid or payable by such
Indemnified Party as a result of such Losses, in such proportion as is
appropriate to reflect the relative fault of the Indemnifying Party and
Indemnified Party in connection with the actions, statements or omissions that
resulted in such Losses as well as any other relevant equitable considerations.
The relative fault of such Indemnifying Party and Indemnified Party shall be
determined by reference to, among other things, whether any action in question,
including any untrue or alleged untrue statement of a material fact or omission
or alleged omission of a material fact, has been taken or made by, or relates to
information supplied by, such Indemnifying Party or Indemnified Party, and the
parties' relative intent, knowledge, access to information and opportunity to
correct or prevent such action, statement or omission. The amount paid or
payable by a party as a result of any Losses shall be deemed to include, subject
to the limitations set forth in Section 5(c), any reasonable attorneys' or other
reasonable fees or expenses incurred by such party in connection with any
Proceeding to the extent such party would have been indemnified for such fees or
expenses if the indemnification provided for in this Section was available to
such party in accordance with its terms.

          The parties hereto agree that it would not be just and equitable if
contribution pursuant to this Section 5(d) were determined by pro rata
allocation or by any other method of allocation that does not take into account
the equitable considerations referred to in the immediately preceding paragraph.
Notwithstanding the provisions of this Section 5(d), no Holder shall be required
to contribute, in the aggregate, any amount in excess of the amount by which the
proceeds actually received by such Holder from the sale of the Registrable
Securities subject to the Proceeding exceeds the amount of any damages that such
Holder has otherwise been required to pay by reason of such untrue or alleged
untrue statement or omission or alleged omission.

          The indemnity and contribution agreements contained in this Section
are in addition to any liability that the Indemnifying Parties may have to the
Indemnified Parties.

                                       -9-         Registration Rights Agreement
<PAGE>   10

ARTICLE LIII Miscellaneous

     53.1 Amendments and Waivers. The provisions of this Agreement, including
the provisions of this sentence, may not be amended, modified or supplemented,
and waivers or consents to departures from the provisions hereof may not be
given, unless the same shall be in writing and signed by the Company and the
Holders of at least two-thirds of the then outstanding Registrable Securities.
Notwithstanding the foregoing, a waiver or consent to depart from the provisions
hereof with respect to a matter that relates exclusively to the rights of
Holders and that does not directly or indirectly affect the rights of other
Holders may be given by Holders of at least a majority of the Registrable
Securities to which such waiver or consent relates; provided, however, that the
provisions of this sentence may not be amended, modified, or supplemented except
in accordance with the provisions of the immediately preceding sentence.

     53.2 No Inconsistent Agreements. Neither the Company nor any of its
subsidiaries has entered, as of the date hereof, nor shall the Company or any of
its subsidiaries, on or after the date of this Agreement, enter into any
agreement with respect to its securities that would have the effect of impairing
the rights granted to the Holders in this Agreement or otherwise conflicts with
the provisions hereof. Except as and to the extent specified in Schedule 6(b)
hereto, neither the Company nor any of its subsidiaries has previously entered
into any agreement granting any registration rights with respect to any of its
securities to any Person.

     53.3 No Piggy-back on Registrations. Except as and to the extent specified
in Schedule 6(b) hereto, neither the Company nor any of its security holders
(other than the Holders in such capacity pursuant hereto) may include securities
of the Company in the Registration Statement other than the Registrable
Securities, and the Company shall not after the date hereof enter into any
agreement providing any such right to any of its security holders.

     53.4 Compliance. Each Holder covenants and agrees that it will comply with
the prospectus delivery requirements of the Securities Act as applicable to it
in connection with sales of Registrable Securities pursuant to the Registration
Statement.

     53.5 Discontinued Disposition. Each Holder agrees by its acquisition of
such Registrable Securities that, upon receipt of a notice from the Company of
the occurrence of any event of the kind described in Sections 3(d)(ii),
3(d)(iii), 3(d)(iv), 3(d)(v) or 3(d)(vi), such Holder will forthwith discontinue
disposition of such Registrable Securities under the Registration Statement
until such Holder's receipt of the copies of the supplemented Prospectus and/or
amended Registration Statement contemplated by Section 3(j), or until it is
advised in writing (the "Advice") by the Company that the use of the applicable
Prospectus may be resumed, and, in either case, has received copies of any
additional or supplemental filings that are incorporated or deemed to be
incorporated by reference in such Prospectus or Registration Statement. The
Company may provide appropriate stop orders to enforce the provisions of this
paragraph.

     53.6 Piggy-Back Registrations. If at any time during the Effectiveness
Period there is not an effective Registration Statement covering all of the
Registrable Securities and the Company shall determine to prepare and file with
the Commission a registration statement relating to an offering for its own
account or the account of others under the Securities Act of

                                      -10-         Registration Rights Agreement
<PAGE>   11

any of its equity securities, other than on Form S-4 or Form S-8 (each as
promulgated under the Securities Act) or their then equivalents relating to
equity securities to be issued solely in connection with any acquisition of any
entity or business or equity securities issuable in connection with stock option
or other employee benefit plans, then the Company shall send to each Holder
written notice of such determination and, if within fifteen days after receipt
of such notice, any such Holder shall so request in writing, the Company shall
include in such registration statement all or any part of such Registrable
Securities such holder requests to be registered.

          (g) Notices. Any and all notices or other communications or deliveries
required or permitted to be provided hereunder shall be in writing and shall be
deemed given and effective on the earliest of (i) the date of transmission, if
such notice or communication is delivered via facsimile at the facsimile
telephone number specified in this Section prior to 6:30 p.m. (New York City
time) on a Business Day, (ii) the Business Day after the date of transmission,
if such notice or communication is delivered via facsimile at the facsimile
telephone number specified in this Agreement later than 6:30 p.m. (New York City
time) on any date and earlier than 11:59 p.m. (New York City time) on such date,
(iii) the Business Day following the date of mailing, if sent by nationally
recognized overnight courier service, or (iv) upon actual receipt by the party
to whom such notice is required to be given. The address for such notices and
communications shall be as follows:

     If to the Company:            DeMarco Energy Systems of America, Inc.
                                   12885 Hwy 183, Ste 108-A
                                   Austin, Texas 78750
                                   Facsimile No.: (512) 335-6380
                                   Attn: Chief Financial Officer

     With copies to:          Locke Liddell & Sapp LLP
                                   100 Congress Avenue
                                   Suite 300
                                   Austin, Texas 78701
                                   Facsimile No.: (512) 305-4800
                                   Attn: Curtis R. Ashmos, Esq.

     If to a Purchaser:       To the address set forth under such Purchaser's
                                   name on the signature pages hereto.

     If to any other Person who is then the registered Holder:

                                   To the address of such Holder as it appears
                                   in the stock transfer books of the Company
or such other address as may be designated in writing hereafter, in the same
manner, by such Person.

          (h) Successors and Assigns. This Agreement shall inure to the benefit
of and be binding upon the successors and permitted assigns of each of the
parties and shall inure to the benefit of each Holder. The Company may not
assign its rights or obligations hereunder without the prior written consent of
each Holder. Each Holder may assign their respective rights hereunder in the
manner and to the Persons as permitted under the Purchase Agreement.

          (i) Counterparts. This Agreement may be executed in any number of
counterparts, each of which when so executed shall be deemed to be an original
and, all of which taken together shall constitute one and the same Agreement. In
the event that any signature is delivered by facsimile transmission, such
signature shall create a valid binding obligation of the party executing (or on
whose behalf such signature is executed) the same with the same force and effect
as if such facsimile signature were the original thereof.

                                      -11-         Registration Rights Agreement
<PAGE>   12

          (j) Governing Law. All questions concerning the construction,
validity, enforcement and interpretation of this Agreement shall be governed by
and construed and enforced in accordance with the internal laws of the State of
New York, without regard to the principles of conflicts of law thereof. Each
party hereby irrevocably submits to the exclusive jurisdiction of the state and
federal courts sitting in the City of New York, borough of Manhattan, for the
adjudication of any dispute hereunder or in connection herewith or with any
transaction contemplated hereby or discussed herein, and hereby irrevocably
waives, and agrees not to assert in any suit, action or proceeding, any claim
that it is not personally subject to the jurisdiction of any such court, that
such suit, action or proceeding is improper. Each party hereby irrevocably
waives personal service of process and consents to process being served in any
such suit, action or proceeding by mailing a copy thereof to such party at the
address in effect for notices to it under this Agreement and agrees that such
service shall constitute good and sufficient service of process and notice
thereof. Nothing contained herein shall be deemed to limit in any way any right
to serve process in any manner permitted by law.

          (k) Cumulative Remedies. The remedies provided herein are cumulative
and not exclusive of any remedies provided by law.

          (l) Severability. If any term, provision, covenant or restriction of
this Agreement is held by a court of competent jurisdiction to be invalid,
illegal, void or unenforceable, the remainder of the terms, provisions,
covenants and restrictions set forth herein shall remain in full force and
effect and shall in no way be affected, impaired or invalidated, and the parties
hereto shall use their reasonable efforts to find and employ an alternative
means to achieve the same or substantially the same result as that contemplated
by such term, provision, covenant or restriction. It is hereby stipulated and
declared to be the intention of the parties that they would have executed the
remaining terms, provisions, covenants and restrictions without including any of
such that may be hereafter declared invalid, illegal, void or unenforceable.

          (m) Headings. The headings in this Agreement are for convenience of
reference only and shall not limit or otherwise affect the meaning hereof.

          (n) Independent Nature of Purchasers' Obligations and Rights. The
obligations of each Purchaser hereunder is several and not joint with the
obligations of any other Purchaser hereunder, and no Purchaser shall be
responsible in any way for the performance of the obligations of any other
Purchaser hereunder. Nothing contained herein or in any other agreement or
document delivered at any closing, and no action taken by any Purchaser pursuant
hereto or thereto, shall be deemed to constitute the Purchasers as a
partnership, an association, a joint venture or any other kind of entity, or
create a presumption that the Purchasers are in any way acting in concert with
respect to such obligations or the transactions contemplated by this Agreement.
Each Purchaser shall be entitled to protect and enforce its rights, including
without limitation the rights arising out of this Agreement, and it shall not be
necessary for any other Purchaser to be joined as an additional party in any
proceeding for such purpose.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK
SIGNATURE PAGES TO FOLLOW]

                                      -12-         Registration Rights Agreement
<PAGE>   13

          IN WITNESS WHEREOF, the parties have executed this Registration Rights
Agreement as of the date first written above.

                                   DEMARCO ENERGY SYSTEMS OF AMERICA, INC.

                                   By:
                                      ------------------------------------------
                                      Name:
                                      Title:

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK
SIGNATURE PAGES OF PURCHASER TO FOLLOW]

<PAGE>   14

                                AJW PARTNERS, LLC
                                By: SMS Group, LLC

                                By:
                                   ---------------------------------------------
                                     Name: Corey S. Ribotsky
                                     Title:

                                Address for Notice:

                                AJW Partners, LLC
                                155 First Street
                                Suite B
                                Mineola, New York 11501
                                Facsimile No.: (516) 739-7115

                                With copies to:
                                Robinson Silverman Pearce Aronsohn & Berman LLP
                                1290 Avenue of the Americas
                                New York, NY 10104
                                Facsimile No.: (212) 541-4630 and (212) 541-1432
                                Attn: Eric L. Cohen, Esq.

<PAGE>   15

                                NEW MILLENNIUM CAPITAL PARTNERS II, LLC
                                By: First Street Manager II, LLC

                                By:
                                   ---------------------------------------------
                                   Name: Glenn A. Arbeitman
                                   Title:

                                Address for Notice:

                                New Millennium Capital Partners II, LLC
                                155 First Street
                                Suite B
                                Mineola, New York 11501
                                Facsimile No.: (516) 739-7115

                                With copies to:
                                Robinson Silverman Pearce Aronsohn & Berman LLP
                                1290 Avenue of the Americas
                                New York, NY 10104
                                Facsimile No.: (212) 541-4630 and (212) 541-1432
                                Attn: Eric L. Cohen, Esq.

Escrow Agreement
<PAGE>   16

                                                                         Annex A

PLAN OF DISTRIBUTION

          The Selling Stockholders and any of their pledgees, assignees and
successors-in-interest may, from time to time, sell any or all of their shares
of Common Stock on any stock exchange, market or trading facility on which the
shares are traded or in private transactions. These sales may be at fixed or
negotiated prices. The Selling Stockholders may use any one or more of the
following methods when selling shares:

o    ordinary brokerage transactions and transactions in which the broker-dealer
     solicits purchasers;

o    block trades in which the broker-dealer will attempt to sell the shares as
     agent but may position and resell a portion of the block as principal to
     facilitate the transaction;

o    purchases by a broker-dealer as principal and resale by the broker-dealer
     for its account;

o    an exchange distribution in accordance with the rules of the applicable
     exchange;

o    privately negotiated transactions;

o    short sales;

o    broker-dealers may agree with the Selling Stockholders to sell a specified
     number of such shares at a stipulated price per share;

o    a combination of any such methods of sale; and

o    any other method permitted pursuant to applicable law.

          The Selling Stockholders may also sell shares under Rule 144 under the
Securities Act, if available, rather than under this prospectus.

          The Selling Stockholders may also engage in short sales against the
box, puts and calls and other transactions in securities of the Company or
derivatives of Company securities and may sell or deliver shares in connection
with these trades. The Selling Stockholders may pledge their shares to their
brokers under the margin provisions of customer agreements. If a Selling
Stockholder defaults on a margin loan, the broker may, from time to time, offer
and sell the pledged shares. The Selling Stockholders have advised the Company
that they have not entered into any agreements, understandings or arrangements
with any underwriters or broker-dealers regarding the sale of their shares other
than ordinary course brokerage arrangements, nor is there an underwriter or
coordinating broker acting in connection with the proposed sale of shares by the
Selling Stockholders.

          Broker-dealers engaged by the Selling Stockholders may arrange for
other brokers-dealers to participate in sales. Broker-dealers may receive
commissions or discounts from the Selling Stockholders (or, if any broker-dealer
acts as agent for the purchaser of shares, from the purchaser) in amounts to be
negotiated. The Selling Stockholders do not expect these commissions and
discounts to exceed what is customary in the types of transactions involved.

          The Selling Stockholders and any broker-dealers or agents that are
involved in selling the shares may be deemed to be "underwriters" within the
meaning of the Securities Act in connection with such sales. In such event, any
commissions received by such broker-dealers or agents and any profit on the
resale of the shares purchased by them may be deemed to be underwriting
commissions or discounts under the Securities Act.

          The Company is required to pay all fees and expenses incident to the
registration of the shares, including fees and disbursements of counsel to the
Selling Stockholders. The Company has agreed to indemnify the Selling
Stockholders against certain losses, claims, damages and liabilities, including
liabilities under the Securities Act.

Escrow Agreement

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