Document:

<PAGE>

                                                                Exhibit 10.15(a)
                                August 6, 1999

Lockhart Industries, Inc.
c./o Alpha Technologies
1155 Dairy Ashford, Suite 216
Houston, Texas 77079

Attn: Johnny J. Blanchard

Re:   Letter Agreement - Lease Extension
      15707 Texaco Avenue
      Paramount, California

Reference is hereby made to that certain Lease dated August 29, 1984 and Lease
Extensions dated February 1, 1991 and June 1996 by and between Garfield-Pacific
Development Co. ("Lessor") and Lockhart Industries, Inc. ("Lessee") for the
Premises commonly known as 15707 Texaco Avenue, Paramount, California.

The parties do hereby agree that said Lease shall be extended for an additional
period of five (5) years commencing November 1, 1999 and ending October 31,
2004. All terms, provisions and conditions of the original Lease shall remain in
full force and effect during the extension period, except as provided as
follows:

1.  For the period November 1, 1999 through October 31, 2000 the monthly rent
shall be $9,500.00.
2.  For the period November 1, 2000 through April 30, 2002 the monthly rent
shall be $9,750.00.
3. For the period May 1, 2002 through October 31, 2003 the monthly rent shall be
determined as follows: The monthly rent payable for April 2002 ($9,750.00) shall
be multiplied by a fraction and the numerator of which shall be the Consumer
Price Index (C.P.I.) of the Bureau of Labor Statistics of the United States
Department of Labor for Urban wage Earners and Clerical Workers, Los Angeles-
Anaheim-Riverside, California (1967=100), "All Items", for the month of March,
2002 and the denominator of which shall be the C.P.I. for the month of
September, 1999. The sum so calculated shall establish the new monthly rent for
the period May 1, 2002 through October 31, 2003. However, in no event shall said
monthly rent be less than $10,237.50 or greater than $10,920.00.
<PAGE>

Lockhart Industries, Inc.
August 6, 1999
Page Two

4.  For the period November 1, 2003 through October 31, 2004 the monthly rent
shall be that monthly rent which has been calculated in Paragraph 3 above (for
the period May 1, 2002 through October 31, 2003) plus $250.00 per month.

Please have two authorized officers sign both originals of this letter
Agreement-Lease Extension indicating your approval of the extension and return
on original to our office at 1176 Main Street, Suite 100, Irvine, CA 92614.

We are delighted that you have decided to renew your Lease and look forward to a
continued relationship with Lockhart Industries in the coming years.

                                        Sincerely,

                                        GARFIELD-PACIFIC
                                        DEVELOPMENT CO.

                                        /s/  Robert D. Bendetti
                                        -----------------------------
                                        By:   Robert D. Bendetti
                                              Authorized Representative

RDB:sl
Cc. John Wenckus

AGREED & ACCEPTED:

Dated: September 15, 1999

By:     Lockhart Industries, Inc.

By:     /s/Johnny J. Blanchard
        ----------------------

Name:   Johnny Blanchard
        -----------------

Title   Secretary & Treasurer
        ----------------------

By:     Lockhart Industries, Inc.

By:     /s/John Wenckus
        ---------------

Name:   John Wenckus
        ------------

Title:  Vice President & General Manager
        --------------------------------<PAGE>

                                                                Exhibit 10.17(a)

                           FIRST AMENDMENT OF LEASE

This Amendment of Lease made on September 28, 1999, for Lease dated September 1,
1993 between B & K INVESTMENT COMPANY (herein called "Lessor") and SPECIALTY
EXTRUSIONS LIMITED (herein called "Lessee"), who agree as follows:

1.     Paragraph 1 - PARTIES - Shall be modified and inserted in lieu thereof
       is the following:

          This lease, dated for reference purposes only, September 1, 1993, is
          made by and between B & K Investment Company (herein called "Lessor")
          and Wakefield Extrusion Company, (herein called "Lessee").

2.     Paragraph 3.1 - TERM - Shall be modified and inserted in lieu thereof
       is the following:

          The term of this lease shall be for three (3) years commencing on
          September 1, 1999 and ending on August 31, 2002 unless terminated
          pursuant to any provision hereof.

3.     Paragraph 4 - RENT - Shall be deleted in its entirety and inserted in
       lieu thereof is the following new paragraph:

          Lessee shall pay to Lessor as rent for the Premises, monthly payments
          of $7,717.00 in advance, on the first day of each month of the term
          hereof.. Rent for any period during the term hereof which is for less
          than one month shall be a pro rata portion of the monthly installment.
          Rent shall be payable in lawful money of the United States to Lessor
          or other persons as Lessor may designate in writing.

4.     Paragraph 15 - BROKER'S FEE - Shall be deleted in its entirety.

5.     Addendum 1 - RENT ESCALATIONS - Shall be deleted in its entirety.

6      Addendum 2 - OPTION TO EXTEND - Shall be deleted in its entirety.

7.     Addendum 3 - OPTION FOR NEW OWNER TO EXTEND - Shall be deleted in
       its entirety.

8.     Effectiveness of Lease - Except as set forth in this Amendment of Lease,
       all provisions of the Lease shall remain unchanged and in full force and
       effect.

LESSOR:                                         LESSEE:

B & K INVESTMENTS COMPANY                       WAKEFIELD EXTRUSION CORP.

By: /s/ Gordon Bagne                            By: /s/ George G. Wright
   ----------------                               ----------------------
        Gordon Bagne,
        General Partner

Date: 10-26-99                                  Date: 10-26-99
      --------                                        --------

By: /s/ Robert A. Klinger
    ---------------------
        Robert A. Klinger,
        General Partner

Date:  11-29-99
       --------<PAGE>

                                                                   EXHIBIT 10.23

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<S>                     <C>

                        This Lease, dated the 1st day of February, 1999 Between Lundell Technologies, Inc., a corporation duly
                        organized and existing under the laws of the State of Washington, hereinafter referred to as the Landlord,
                        and Neurotech Development Corp., a corporation duly organized and existing under the laws of the State of
Parties                 Delaware, hereinafter referred to as the Tenant,
                        WITNESSETH: That the Landlord hereby demises and leases unto the Tenant, and the Tenant hereby hires and
                        takes from the Landlord for the term and upon the rentals hereinafter specified, the premises described as
                        follows, situated in the Village of Manhasset County of Nassau and State of New York, and more particularly
                        the basement and ground floors of the premises commonly known as 45 Orchard Street.
Premises

Term                       The term of this demise shall be for one (1) year beginning February 1, 1999 and ending January 31, 2000.

Rent                       The rent for the demised term shall be Twenty-four thousand and 00/100 dollars ($24,000.00).

                           The said rent is to be payable monthly in advance on the first day of each calendar month for the term
Payment of              hereof, in installments as follows:
Rent
                        equal monthly installments of two-thousand an 00/100 dollars ($2,000.00)
                        at the office of Landlord or as may be otherwise directed by the Landlord in writing.

                                        THE ABOVE LETTING IS UPON THE FOLLOWING CONDITIONS:

Peaceful                   First.--The Landlord covenants that the Tenant, on paying the said rental and performing the covenants
Possession              and conditions in this Lease contained, shall and may peaceably and quietly have, hold and enjoy the
                        demised premises for the term aforesaid.

Purpose                    Second.--The Tenant covenants and agrees to use the demised premises as in office space and agrees not to
                        use or permit the premises to be used for any other purpose without the prior written consent of the
                        Landlord endorsed hereon.

Default in Pay-            Third.--The Tenant shall, without any previous demand therefor, pay to the Landlord, or its agent, the
ment of Rent            said rent at the times and in the manner above provided. In the event of the non-payment of said rent, or
                        any installment thereof, at the times and in the manner above provided, and if the same shall remain in
                        default for ten days after becoming due, or if the Tenant shall be dispossessed for non-payment of rent, or
Abandonment             if the leased premises shall be deserted or vacated, the Landlord or its agents shall have the right to and
of Premises             may enter the said premises as the agent of the Tenant, either by force or otherwise, without being liable
                        for any prosecution or damages therefor, and may relet the premises as the agent of the Tenant, and receive
                        the rent therefor, upon such terms as shall be satisfactory to the Landlord, and all rights of the Tenant to
                        repossess the premises under this lease shall be forfeited. Such re-entry by the Landlord shall not operate
Re-entry and            to release the Tenant from any rent to be paid or covenants to be performed hereunder during the full term
Reletting by            of this lease. For the purpose of reletting, the Landlord shall be authorized to make such repairs or
Landlord                alterations in or to the leased premises as may be necessary to place the same in good order and condition.
                        The Tenant shall be liable to the Landlord for the cost of such repairs or alterations, and all expenses of
                        such reletting. If the sum realized or to be realized from the reletting is insufficient to satisfy the
Tenant Liable           monthly or term rent provided in this lease, the Landlord, at its option, may require the Tenant to pay
for Deficiency          such deficiency month by month, or may hold the Tenant in advance for the entire deficiency to be realized
                        during the term of the reletting. The Tenant shall not be entitled to any surplus accruing as a result of
                        the reletting. The Landlord is hereby granted a lien, in addition to any statutory lien or right to distrain
Lien of                 that may exist, on all personal property of th Tenant in or upon the demised premises, to secure payment of
Landlord to             the rent and performance of the covenants and conditions of this lease. The Landlord shall have the right,
Secure                  as agent of the Tenant, to take possession of any furniture, fixtures or other personal property of the
                        Tenant found in or about the premises, and sell the same at public or private sale and to apply the proceeds
                        thereof to the payment of any monies becoming due under this lease, the Tenant hereby waiving the benefit of
Performance             all laws exempting property from execution, levy and sale on distress or judgment. The Tenant agrees to pay,
Attorney's Fees         as addition rent, all attorney's fees and other expenses incurred by the Landlord in enforcing any of the
                        obligations under this lease.

Sub-letting and           Fourth.--This lease be assigned by the Tenant without the prior written consent of the Landlord endorsed
Assignment              hereon.

Condition of               Fifth.--The Tenant has examined the demised premises, and accepts them in their present condition (except
Premises,               as otherwise expressly provided herein) and without any representations on the part of the Landlord or its
Repairs                 agents as to the present or future condition of the said premises. The Tenant shall keep the demised
                        premises in good condition, and shall redecorate, paint and renovate the said premises as may be necessary
                        to keep them in repair and good appearance. The Tenant shall quit and surrender the premises at the end of
                        the demised term in as good condition as the reasonable use thereof will permit. The Tenant shall not make
                        any alterations, additions, or improvements to said premises without the

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<TABLE>
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<S>                     <C>

Alterations and         prior written consent of the Landlord. All erections, alterations, additions and improvements, whether
Improvements            temporary or permanent in character, which may be made upon the premises either by the Landlord or the
                        Tenant, except furniture or movable trade fixtures installed at the expense of the Tenant, shall be the
                        property of the Landlord and shall remain upon and be surrendered with the premises as a part thereof at the
Sanitation,             termination of this Lease, without compensation to the Tenant. The Tenant further agrees to keep said
Inflammable             premises and all parts thereof in a clean and sanitary condition and free from trash, inflammable material
Materials               and other objectionable matter. If this lease covers premises, all or a part of which are on the ground
                        floor, the Tenant further agrees to keep the sidewalks in front of such ground floor portion of the demised
                        premises clean and free of obstructions, snow and ice.

Mechanics'                 Sixth.--In the event that any mechanics' lien is filed against the premises as a result of alterations,
Liens                   additions or improvements made by the Tenant, the Landlord, at its option, after thirty days' notice to the
                        Tenant, may terminate this lease and may pay the said lien, without inquiring into the validity thereof, and
                        the Tenant shall forthwith reimburse the Landlord the total expense incurred by the Landlord in discharging
                        the said lien, as additional rent hereunder.

Glass                      Seventh.--The Tenant agrees to replace at the Tenant's expense any and all glass which may become broken
                        in and on the demised premises. Plate glass and mirrors, if any, shall be insured by the Tenant at their
                        full insurable value in a company satisfactory to the Landlord. Said policy shall be of the full premium
                        type, and shall be deposited with the Landlord or its agent.

Liability of               Eighth.--The Landlord shall not be responsible for the loss of or damage to property, or injury to
Landlord                persons, occurring in or about the demised premises, by reason of any existing or future condition, defect,
                        matter or thing in said demised premises or the property of which the premises are a part, or for the acts,
                        omissions or negligence of other persons or tenants in and about the said property. The Tenant agrees to
                        indemnify and save the Landlord harmless from all claims and liability for losses of or damage to property,
                        or injuries to persons occurring in or about the demised premises.

Services and               Ninth.--Utilities and services furnished to the demised premises for the benefit of the Tenant shall be
Utilities               provided and paid for as follows: water by the Landlord; gas by the Landlord; electricity by the Landlord;
                        heat by the Landlord; refrigeration by the Landlord; hot water by the Landlord. The Landlord shall not be
                        liable for any interruption or delay in any of the above services for any reason.

Right to Inspect           Tenth.--The Landlord, or its agents, shall have the right to enter the demised premises at reasonable
and Exhibit             hours in the day or night to examine the same, or to run telephone or other wires, or to make such repairs,
                        additions or alterations as it shall deem necessary for the safety, preservation or restoration of the
                        improvements, or for the safety or convenience of the occupants or users thereof (there being no obligation,
                        however, on the part of the Landlord to make any such repairs, additions or alteration), or to exhibit the
                        same to prospective purchasers and put upon the premises a suitable "For Sale" sign. For three months prior
                        to the expiration of the demised term, the Landlord, or its agents, may similarly exhibit the premises to
                        prospective tenants, and may place the usual "To Let" signs thereon.

Damage by Fire,            Eleventh.--In the event of the destruction of the demised premises or the building containing the said
Explosion,              premises by fire, explosion, the elements or otherwise during the term hereby created, or previous thereto,
The Elements or         or such partial destruction thereof as to render the premises wholly untenantable or unfit for occupancy, or
Otherwise               should the demised premises be so badly injured that the same cannot be repaired within ninety days from the
                        happening of such injury, then and in such case the term hereby created shall, at the option of the
                        Landlord, cease and become null and void from the date of such damage or destruction, and the Tenant shall
                        immediately surrender said premises and all the Tenant's interest therein to the Landlord, and shall pay
                        rent only to the time of such surrender, in which event the Landlord may re-enter and re-possess the
                        premises thus discharged from this lease and may remove all parties therefrom. Should the demised premises
                        be rendered untenantable and unfit for occupancy, but yet be repairable within ninety days from the
                        happening of said injury, the Landlord may enter and repair the same with reasonable speed, and the rent
                        shall not accrue after said injury or while repairs are being made, but shall recommence immediately after
                        said repairs shall be completed. But if the premises shall be so slightly injured as not to be rendered
                        untenantable and unfit for occupancy, then the Landlord agrees to repair the same with reasonable promptness
                        and in that case the rent accrued and accruing shall not cease or determine. The Tenant shall immediately
                        notify the Landlord in case of fire or other damage to the premises.

Observation                Twelfth.--The Tenant agrees to observe and comply with all laws, ordinances, rules and regulations of the
of Laws,                Federal, State, County and Municipal authorities applicable to the business to be conducted by the Tenant in
Ordinances,             the demised premises. The Tenant agrees not to do or permit anything to be done in said premises, or keep
Rules and               anything therein, which will increase the rate of the fire insurance premiums on the improvements or any
Regulations             part thereof, or on property kept therein, or which will obstruct or interfere with the rights of other
                        tenants, or conflict with the regulations of the Fire Department or with any insurance policy upon said
                        improvements or any part thereof. In the event of any increase in insurance premiums resulting from the
                        Tenant's occupancy of the premises, or from any act or omission on the part of the Tenant, the Tenant agrees
                        to pay said increase in insurance premiums on the improvements or contents thereof as additional rent.

Signs                      Thirteenth.--No sign, advertisement or notice shall be affixed to or placed upon any part of the demised
                        premises by the Tenant, except in such manner, and of such size, design and color as shall be approved in
                        advance in writing by the Landlord.

Subordination              Fourteenth.--This lease is subject and is hereby subordinated to all present and future mortgages, deeds
to Mortgages            of trust and other encumbrances affecting the demised premises or the property of which said premises are a
and Deeds               part. The Tenant agrees to execute, at no expense to the Landlord, any instrument which may be deemed
of Trust                necessary or desirable by the Landlord to further effect the subordination of this lease to any such
                        mortgage, deed of trust or encumbrance.

Sale of                    Fifteenth.--In the event of the sale by the Landlord of the demised premises, or the property of which
Premises                said premises are a part, the Landlord or the purchaser may terminate this lease on the thirtieth day of
                        April in any year upon giving the Tenant notice of such termination prior to the first day of January in the
                        same year.

Rules and                  Sixteenth.--The rules and regulations regarding the demised premises, affixed to this lease, if any, as
Regulations of          well as any other and further reasonable rules and regulations which shall be made by the Landlord, shall be
Landlord                observed by the Tenant and by the Tenant's employees, agents and customers. The Landlord reserves the right
                        to rescind any presently existing rules applicable to the demised premises, and to make such other and
                        further reasonable rules and regulations as, in its judgment, may from time to time be desirable for the
                        safety, care and cleanliness of the premises, and for the preservation of good order therein, which rules,
                        when so made and notice thereof given to the Tenant, shall have the same force and effect as if originally
                        made a part of this lease. Such other and further rules shall not, however, be inconsistent with the proper
                        and rightful enjoyment by the Tenant of the demised premises.

Violation of              Seventeenth.--In case of violation by the Tenant of any of the covenants, agreements and conditions of
Covenants,              this lease, or of the rules and regulations now or hereafter to be reasonably established by the Landlord,
Forfeiture of           and upon failure to discontinue such violation within ten days after notice therof given to the Tenant, this
Lease, Re-entry         lease shall thenceforth, at the option of the Landlord, become null and void, and the Landlord may re-enter
by Landlord             without further notice or demand. The rent in such case shall become due, be apportioned and paid on and up
                        to the day of such re-entry, and the Tenant shall be liable for all loss or damage resulting from such
                        violation as aforesaid. No waiver by the Landlord of any violation or breach of condition by the Tenant
Non-waiver              shall constitute or be construed as a waiver of any other violation or breach of condition, nor shall lapse
of Breach               of time after breach of condition by the Tenant before the Landlord shall exercise its option under this
                        paragraph operate to defeat the right of the Landlord to declare this lease null and void and to re-
                        enter upon the demised premises after the said breach or violation.
</TABLE>
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<TABLE>
<S>                     <C>
Notices                   Eighteenth.--All notices and demands, legal or otherwise, incidental to this lease, or the occupation of
                        the demised premises, shall be in writing. If the Landlord or its agent desires to give or serve upon the
                        Tenant any notice or demand, it shall be sufficient to send a copy thereof by registered mail, addressed to
                        the Tenant at the demised premises, or to leave a copy thereof with a person of suitable age found on the
                        premises, or to post a copy thereof upon the door to said premises. Notices from the Tenant to the Landlord
                        shall be sent by registered mail or delivered to the landlord at the place hereinbefore designated for the
                        payment of rent, or to such party or place as the Landlord may from time to time designate in writing.

Bankruptcy,               Nineteenth.--It is further agreed that if at any time during the term of this lease the Tenant shall make
Insolvency,             any assignment for the benefit of creditors, or be decreed insolvent or bankrupt according to law, or if a
Assignment for          receiver shall be appointed for the Tenant, then the Landlord may, at its option, terminate this lease,
Benefit of              exercise of such option to be evidenced by notice to that effect served upon the assignee, receiver, trustee
Creditors               or other person in charge of the liquidation of the property of the Tenant or the Tenant's estate, but such
                        termination shall not release or discharge any payment of rent payable hereunder and then accrued, or any
                        liability then accrued by reason of any agreement or covenant herein contained on the part of the Tenant, or
                        the Tenant's legal representatives.

Holding Over              Twentieth.--In the event that the Tenant shall remain in the demised premises after the expiration of the
by Tenant               term of this lease without having executed a new written lease with the Landlord, such holding over shall
                        not constitute a renewal or extension of this lease. The Landlord may, at its option, elect to treat the
                        Tenant as one who has not removed at the end of his term, and thereupon be entitled to all the remedies
                        against the Tenant provided by law in that situation, or the Landlord may elect, at its option, to construe
                        such holding over as a tenancy from month to month, subject to all the terms and conditions of this lease,
                        except as to duration thereof, and in that event the Tenant shall pay monthly rent in advance at the rate
                        provided herein as effective during the last month of the demised term.

Eminent                   Twenty-first.--If the property or any part thereof wherein the demised premises are located shall be taken
Domain,                 by public or quasi-public authority under any power or eminent domain or condemnation, this lease, at the
Condemnation            option of the Landlord, shall forthwith terminate and the Tenant shall have no claim or interest in or to
                        any award of damages for such taking.

Security                 Twenty-second.--The Tenant has this day deposited with the Landlord the sum of $    as security for
                        the full and faithful performance by the Tenant of all the terms, covenants and conditions of this lease
                        upon the Tenant's part to be performed, which said sum shall be returned to the Tenant after the time fixed
                        as the expiration of the term herein, provided the Tenant has fully and faithfully carried out all of said
                        terms, covenants and conditions on Tenant's part to be performed. In the event of a bona fide sale, subject
                        to this lease, the Landlord shall have the right to transfer the security to the vendee for the benefit of
                        the Tenant and the Landlord shall be considered released by the Tenant from all liability for the return of
                        such security; and the Tenant agrees to look to the new Landlord solely for the return of the said security,
                        and it is agreed that this shall apply to every transfer or assignment made of the security to a new
                        Landlord. The security deposited under this lease shall not be mortgaged, assigned or encumbered by the
                        Tenant without the written consent of the Landlord.

Arbitration               Twenty-third.--Any dispute arising under this lease shall be settled by arbitration. Then Landlord and
                        Tenant shall each choose an arbitrator, and the two arbitrators thus chosen shall select a third arbitrator.
                        The findings and award of the three arbitrators thus chosen shall be final and binding on the parties
                        hereto.

Delivery of               Twenty-fourth.--No rights are to be conferred upon the Tenant until this lease has been signed by the
Lease                   Landlord, and an executed copy of the lease has been delivered to the Tenant.

Lease Provisions          Twenty-fifth.--The foregoing rights and remedies are not intended to be exclusive but as additional to all
Not Exclusive           rights and remedies the Landlord would otherwise have by law.

Lease Binding             Twenty-sixth.--All of the terms, covenants and conditions of this lease shall inure to the benefit of and
on Heirs,               be binding upon the respective heirs, executors, administrators, successors and assigns of the parties
Successors, Etc.        hereto. However, in the event of the death of the Tenant, if an individual, the landlord may, at its option,
                        terminate this lease by notifying the executor or administrator of the Tenant at the demised premises.

                          Twenty-seventh.--This lease and the obligation of Tenant to pay rent hereunder and perform all of the
                        other covenants and agreements hereunder on part of Tenant to be performed shall in nowise be affected,
                        impaired or excused because Landlord is unable to supply or is delayed in supplying any service expressly or
                        impliedly to be supplied or is unable to make, or is delayed in making any repairs, additions, alterations
                        or decorations or is unable to supply or is delayed in supplying any equipment or fixtures if Landlord is
                        prevented or delayed from so doing by reason of governmental preemption in connection with the National
                        Emergency declared by the President of the United States or in connection with any rule, order or regulation
                        of any department or subdivision thereof of any governmental agency or by reason of the conditions of supply
                        and demand which have been or are affected by the war.

                          Twenty-eighth.--This instrument may not be changed orally.

     IN WITNESS WHEREOF, the said Parties have hereunto set their hands and seals the day and year first above written.

Witness:                                                               /s/ Steven A. Massey               (SEAL)
                                                                  ---------------------------------------
                                                                  Lundell Technologies, (Landlord)

/s/ Leonard Markman                                               By
-----------------------------                                       --------------------------------------
   Leonard Markman                                                  Steven A. Massey, Pres.

                                                                      /s/ Lawrence Artz, Vice President   (SEAL)
-----------------------------                                       --------------------------------------
                                                                                  Tenant
                                                                    Neurotech Development Corp., by
                                                                    Lawrence Artz, Vice President
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<TABLE>
<S>                                                     <C>

                                                             GUARANTY

        In consideration of the execution of the within lease by the Landlord, at the request of the undersigned and in reliance of
this guaranty, the undersigned hereby guarantees unto the Landlord, its successors and assigns, the prompt payment of all rent and
the performance of all of the terms, covenants and conditions provided in said lease, hereby waiving all notice of default, and
consenting to any extensions of time or changes in the manner of payment or performance of any of the terms and conditions of the
said lease the Landlord may grant the Tenant, and further consenting to the assignment and the successive assignments of the said
lease, and any modifications thereof, including the sub-letting and changing of the use of the demised premises, all without notice
to the undersigned. The undersigned agrees to pay the Landlord all expenses incurred in enforcing the obligations of the Tenant
under the within lease and in enforcing this guaranty.

Witness:
        ---------------------------------                                  --------------------------------- (SEAL)

        ---------------------------------                                  --------------------------------- (SEAL)

Date: -----------------------------------
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<TABLE>
<S>                                                             <C>
                                                               LEASE

====================================================================================================================================

                                                    LUNDELL TECHNOLOGIES,INC.

                                                                                                                            Landlord

                                                                to

                                                   NEUROTECH DEVELOPMENT CORP.,

                                                                                                                              Tenant

====================================================================================================================================

Premises Leased: Basement and Ground Floors

45 Orchard Street
Manhasset, New York 11030

From:  February 1, 1999
To:    January 31, 2000

                                              ASSIGNMENT AND ACCEPTANCE OF ASSIGNMENT

        For value received the undersigned Tenant hereby assigns all of said Tenant's right, title and interest in and to the within
lease from and after                            unto
heirs, successors, and assigns, the demised premises to be used and occupied for

                                                                        and for no other purpose, it being expressly agreed that
this assignment shall not in any manner relieve the undersigned assignor from liability upon any of the covenants of this lease.

Witness: _________________________________________                      _________________________________________________ (SEAL)

         _________________________________________                      _________________________________________________  (SEAL)

Date:    _________________________________________

        In consideration of the above assignment and the written consent of the Landlord thereto, the undersigned assignee, hereby
assumes and agrees from and after                                       to make all payments and to perform all covenants and
conditions provided inthe within lease by the Tenant therein to be made and performed.

Witness: _________________________________________                      _________________________________________________ (SEAL)

         _________________________________________                      _________________________________________________ (SEAL)

Date:    _________________________________________

                                                       CONSENT TO ASSIGNMENT

        The undersigned Landlord hereby consents to the assignment of the within lease to

on the express conditions that the original Tenant

                                       , the assignor, herein, shall remain liable for the prompt payment of the rent and the
performance of the covenants provided in the said lease by the Tenant to be made and performed, and that no further assignment of
said lease or sub-letting of any part of the premises thereby demised shall be made without the prior written consent of the
undersigned Landlord.

                                                                    _____________________________________________________
                                                                                           Landlord

Date: ____________________________________________                  By  __________________________________________________

</TABLE>

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