Document:

<PAGE>

                                                                   EXHIBIT 10.4

                          TRADEMARK SECURITY AGREEMENT
                          ----------------------------

          THIS TRADEMARK SECURITY AGREEMENT (the "Agreement") is made and
entered into as of June 30, 2000, by ENVIRONMENTAL ELEMENTS CORPORATION, a
Delaware corporation (the "Debtor"), in favor of MERCANTILE-SAFE DEPOSIT AND
TRUST COMPANY, a Maryland banking corporation (the "Secured Party").

                                    Recitals
                                    --------

          A.  The Secured Party and the Debtor are parties to that certain
Revolving Credit and Letter of Credit Agreement dated as of November 24, 1993
(as amended, supplemented, or otherwise modified, the "Agreement").  Capitalized
terms used herein without definition have the meanings provided in the
Agreement.

          B.  To secure the Obligations ("Obligations"), the Debtor has agreed
to enter into this Agreement.

                                   Agreement
                                   ---------

          NOW THEREFORE, in consideration of the premises and in order to induce
the Secured Party to enter into the Lease, the Debtor hereby agrees with the
Secured Party as follows:

          1.  Creation of Security Interest.  In order to secure the payment of
              -----------------------------
and performance of all Obligations, the Debtor hereby grants to the Secured
Party a security interest in and assigns to Secured Party all of the Debtor's
trademarks, trademark registrations, tradenames, trademark applications and
domain names and applications owned or licensed by Debtor in the United States
and Canada (the "Trademark Countries") that, in each case, are now filed with
the U.S. Trademark and Trademark Office, any similar office or agency of any
state, territory or possession of the United States, or any similar office or
agency of Canada, or used in the United States, any state, territory or
possession thereof, or Canada, including but not limited to the trademark
registrations and trademark applications listed on Schedule A attached hereto
                                                   ----------
and made a part hereof, and (i) renewals thereof, (ii) all income, royalties,
damages and payments due or payable with respect thereto, including, without
limitation, payments under all licenses entered into in connection therewith and
damages and payments for past or future infringements thereof, (iii) the right
to sue for past, present and future infringements thereof, and (iv) all rights
corresponding thereto throughout the world (all of the foregoing trademarks,
trademark registrations, tradenames and trademark applications, domain names and
applications, together with the items described in clauses (i)-(iv) in this
subparagraph (a), are sometimes hereinafter referred to, either individually or
collectively, as the "Trademarks"); and the goodwill of the Company's business
connected with and symbolized by the Trademarks.  All of the foregoing shall be
the "Collateral".

          2.  Restrictions on Future Agreements.  Until the Obligations shall
              ---------------------------------
have been satisfied in full, the Debtor will not without the Secured Party's
prior written consent, (a) enter into any agreement that is inconsistent with
the Debtor's obligations under this Agreement or any
<PAGE>

Other Agreements to which the Debtor is a party, (b) intentionally take any
action, or permit any action to be taken by others subject to its control, or
intentionally fail to take any action (including, without limitation, the
intentional abandonment of any Trademark that is material to the conduct of the
Debtor's business as then conducted), that would adversely affect the validity
or enforceability of the rights transferred to the Secured Party under this
Agreement, or (c) enter into any other contractual obligations that would
restrict or inhibit the Secured Party's rights to sell or otherwise dispose of
the Trademarks or any part thereof after the occurrence of any Lease Event of
Default; provided, however, that the Debtor may, without the Secured Party's
consent, grant one or more nonexclusive, transferable licenses under the
Trademarks, provided that (i) each such license is subject to the terms of this
Agreement, (ii) that such license is not otherwise inconsistent with the
Debtor's obligations under this Agreement, or any Other Agreements to which the
Debtor is a party and (iii) the Debtor shall give the Secured Party prior
written notice of such grant; provided further, that promptly, but no later than
five Business Days after the receipt of any proceeds resulting from such
assignment or exclusive license, the Debtor shall pay such proceeds to the
Secured Party; and provided further, that promptly, but no later than five (5)
business days after the receipt of any proceeds resulting from such assignment
or exclusive license, the Debtor shall pay such proceeds to the Secured Party.

          3.  Trademarks.  The Debtor represents and warrants that, to the best
              ----------
of its knowledge, it has provided to Secured Party a list of all of the Debtor's
trademarks, trademark registrations, tradenames, trademark applications, domain
names and applications, wherever located, that are as of the date hereof used by
the Debtor in its business or owned by or are pending on behalf of the Debtor.

          4.  Representations and Warranties. The Debtor hereby represents,
              ------------------------------
warrants, covenants and agrees that:

              (a) It is the owner or authorized licensee of all of the right,
title and interest in the Trademarks, free from any lien or encumbrance except
for the security interest granted pursuant to this Agreement (other than
Permitted Encumbrances).

              (b) It has made no previous assignment, transfer or agreements in
conflict herewith or constituting a present or future assignment, transfer, or
encumbrance on any of the Trademarks.

              (c) After the date hereof and prior to termination of this
Agreement pursuant to Section 5, it will not execute, and there will not be on
file in any public office, any financing statement or other document or
instruments evidencing or giving notice of liens affecting the Trademarks.

              (d) To its knowledge, no material infringement or unauthorized use
presently is being made of any of the Trademarks that would adversely affect the
fair market value of the Trademarks or the benefits of this Agreement granted to
the Secured Party, including, without limitation, the remedies of the Secured
Party hereunder.

              (e) There has been no judgment holding any of the Trademarks
invalid or unenforceable, in whole or part nor is the validity or enforceability
of any of the

                                      -2-
<PAGE>

Trademarks presently being questioned in any litigation or proceeding to which
the Debtor is a party.

          5.  Term.  The term of the Agreement shall commence as of the date
              ----
hereof and terminate at such time as all of the Obligations have been fully
satisfied and Borrower has no remaining loan or other credit facilities of any
kind with the Secured Party.

          6.  Duties of the Debtor. Until all Obligations then due and owing
              --------------------
shall have been paid in full and this Agreement shall have been terminated, the
Debtor shall (i) prosecute diligently any Trademark application that is part of
the Trademarks pending as of the date hereof, (ii) make application on
unpatented but patentable inventions that are part of the Collateral as it deems
appropriate in its business judgment, (iii) preserve and maintain all rights in
Trademark applications and Trademarks that are part of the Trademarks, including
the payment of all maintenance fees; (iv) not intentionally abandon any pending
Trademark application if in its business judgment the value thereof could be
expected to justify the cost of obtaining such Trademark, and (v) not
intentionally abandon any Trademark. Any expenses incurred in connection with
the applications referred to in this Section 6 shall be borne by the Debtor. The
Debtor agrees to retain or employ an experienced Trademark attorney for the
filing and prosecution of all such applications and other proceedings. The
Debtor shall keep the Secured Party advised on a current basis of the
abandonment of any Trademark or Trademark application, and the grant of any
nonexclusive Trademark license, to the extent such Trademarks or Trademark
applications are part of the Trademarks.

          If the Debtor fails to comply with any of the foregoing duties, the
Secured Party may so comply in the Debtor's name to the extent permitted by law,
but at the Debtor's expense, and the Debtor hereby agrees to reimburse the
Secured Party in full for all reasonable expenses, including the reasonable fees
and disbursements of attorneys and paralegals (excluding charges for inside
counsel) incurred by the Secured Party in protecting, defending and maintaining
the Trademarks.

          If the Debtor shall fail to pay when due any fees required to be paid
by it hereunder, or shall fail to discharge any Lien prohibited hereby, or shall
fail to comply with any other duty hereunder, the Secured Party may, but shall
not be required to, pay, satisfy, discharge or bond the same for the account of
the Debtor, and all moneys so paid out shall be a part of the  Obligations of
the Debtor repayable on demand, together with interest at the default rate.

          The Debtor shall take all action reasonably necessary to preserve and
maintain the validity, perfection and priority of the Secured Party's interest
granted herein in the Trademarks, subject to Permitted Encumbrances.

          7.  Secured Party's Right to Sue.  From and after the occurrence and
              ----------------------------
during the continuance of an Event of Default, the Secured Party shall have the
right, but shall in no way be obligated, to bring suit in its own name to
enforce the Trademarks, and any licenses thereunder, and, if the Secured Party
shall commence any such suit, the Debtor shall, at the request of the Secured
Party, do any and all lawful acts and execute any and all proper documents
reasonably required by the Secured Party in aid of such enforcement and the
Debtor shall indemnify and shall, upon demand, promptly reimburse the Secured
Party for all damages

                                      -3-
<PAGE>

and reasonable costs and expenses, including reasonable attorneys' fees and
expenses, incurred by the Secured Party in the exercise of its rights under this
Section 7.

          8.  Waivers. No course of dealing between the Debtor 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 privilege hereunder 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.

          9.  Amendments. This Agreement or any provision thereof may be
              ----------
changed, waived, or terminated only by a writing executed by the parties hereto.

          10. Remedies.  If any Event of Default shall have occurred and be
              --------
continuing, the Secured Party shall be entitled to exercise in respect of the
Trademarks, in addition to other rights and remedies provided for herein, and in
the Other Agreements or otherwise available to it, all of the rights and
remedies of a secured party under the Uniform Commercial Code in effect in the
State of Maryland ("UCC"), whether or not the UCC applies to the Trademarks, and
also may (i) require the Debtor, and the Debtor hereby agrees that it will upon
written the request of the Secured Party, forthwith, (A) execute and deliver an
assignment, in the form required by Secured Party, of all right, title and
interest in and to the Trademarks, and (B) take such other action as the Secured
Party may request to effectuate the outright assignment of such Trademarks or to
exercise, register or further perfect and protect its rights and remedies with
respect to such assigned Trademarks, and (ii) without notice except as specified
below, sell the Trademarks or any part thereof in one or more parcels at public
or private sale, at any of the Secured Party's offices or elsewhere, for cash,
on credit or for future delivery, and upon such terms as the Secured Party may
deem commercially reasonable.  The Debtor agrees that at least ten (10) days'
notice to the Debtor of the time and place of any public sale or the time that
any private sale is to be made shall constitute reasonable notification.  The
Secured Party shall not be obligated to make any sale of the Trademarks
regardless of notice of sale having been given. The Secured Party may adjourn
any public or private sale from time to time by announcement at the time and
place fixed therefor, and such sale may, without further notice, be made at the
time and place to which it was so adjourned.  The Secured Party may purchase all
or any part of the Trademarks at public or, if permitted by law, private sale
and, in lieu of actual payment of such purchase price, may setoff the amount of
such price against the Obligations.  The proceeds realized from the sale of any
Trademarks shall be applied as provided in the Agreement. If any deficiency
shall arise, the Debtor shall remain liable to the Secured Party therefor.  The
commencement of any action, legal or equitable, or the rendering of any judgment
or decree for deficiency shall not affect the Secured Party's interest in the
Trademarks until the Obligations are fully paid.  The Debtor agrees that the
Secured Party has no obligation to preserve rights to the Trademarks against any
other parties.

          11. Cumulative Remedies; Power of Attorney.  All of the Secured
              --------------------------------------
Party's rights and remedies with respect to the Trademarks, whether established
hereby, by the Lease, by any other Loan Document, or by law shall be cumulative
and may be exercised singularly or concurrently.  The Debtor hereby authorizes
the Secured Party to make, constitute and appoint any officer or agent of the
Secured Party as the Secured Party may select, in its sole discretion, as

                                      -4-
<PAGE>

the Debtor's true and lawful attorney-in-fact, with power, from and after the
occurrence of an Event of Default to (a) endorse the Debtor's name on all
applications, documents, papers and instruments necessary or desirable for the
Secured Party in the use of the Trademarks, including, without limitation, if
the Debtor fails to execute and deliver within three (3) days of the Secured
Party's written request therefor the assignment required by Secured Party, (b)
take any other actions with respect to the Trademarks as the Secured Party deems
in the best interest of the Secured Party, (c) grant or issue any exclusive or
non-exclusive license under the Trademarks to anyone, or (d) assign, pledge,
convey or otherwise transfer title in or dispose of the Trademarks to anyone.
The Debtor hereby ratifies all that such attorney shall lawfully do or cause to
be done by virtue hereof in accordance with the terms hereof. This power of
attorney, being coupled with an interest, shall be irrevocable until all
Obligations shall have been paid in full and this Agreement has been terminated.
The Debtor acknowledges and agrees that this Agreement is not intended to limit
or restrict in any way the rights and remedies of the Secured Party under the
Lease and the Other Agreements but rather is intended to facilitate the exercise
of such rights and remedies.

          12. Notice. Any notice, approval, consent or other communication to
              ------
any party hereunder shall be in the form and manner, and to the addresses as set
forth in the Agreement.

          13. Continuing Security Interest; Binding Effect; Benefits of
              ---------------------------------------------------------
Agreement. This Agreement shall create a continuing security interest in the
---------
Trademarks and shall (i) remain in full force and effect until payment in full
of all Obligations, (ii) be binding upon the Debtor its successors and assigns,
and (iii) inure, together with the rights and remedies of the Secured Party
hereunder, to the benefit of the Secured Party and its successors and permitted,
transferees and assigns.

          14. Authority of Secured Party. The Secured Party shall have and be
              --------------------------
entitled to exercise all powers hereunder that are specifically delegated to the
Secured Party by the terms hereof, together with such powers as are reasonably
incident thereto. The Secured Party may perform any of its duties hereunder or
in connection with the Trademarks by or through agents or employees and shall be
entitled to retain counsel and to act in reliance upon the advice of counsel
concerning all such matters. The Secured Party and its directors, officers,
employees, attorneys and agents shall be entitled to rely on any communication,
instrument or document believed by it or them to be genuine and correct and to
have been signed or sent by the proper person or persons. Neither the Secured
Party nor any director, officer, employee, attorney or agent of the Secured
Party shall be liable to the Debtor for any action taken or omitted to be taken
by it or them hereunder, except for its or their own gross negligence, willful
misconduct, nor shall the Secured Party be responsible for the validity,
effectiveness or sufficiency hereof or of any document or security furnished
pursuant hereto. The Debtor agrees to indemnify and hold harmless the Secured
Party and any other person from and against any and all reasonable costs and
expenses (including reasonable attorney's fees and expenses), claims or
liability incurred by the Secured Party or such person hereunder, unless such
claim or liability shall be due to willful misconduct or gross negligence on the
part of the Secured Party or such person.

          15. Waiver. To the fullest extent it may lawfully so agree, the
              ------
Debtor agrees that it will not at any time insist upon, claim, plead, or take
any benefit or advantage of any

                                      -5-
<PAGE>

appraisement, valuation, stay, extension, moratorium, redemption or similar law
now or hereafter in force in order to prevent, delay, or hinder the enforcement
hereof or the absolute sale of any part of the Trademarks. The Debtor for itself
and all who claim through it, so far as it or they now or hereafter lawfully may
do so, hereby waives the benefit of all such laws, and all right to have the
Trademarks marshalled upon any foreclosure hereof, and agrees that any court
having jurisdiction to foreclose this Agreement may order the sale of the
Trademarks as an entirety.

          16. [Intentionally Omitted].

          17. Reinstatement. This Agreement shall continue to be effective or
              -------------
be reinstated, as the case may be, if at any time any amount received by the
Secured Party in respect of the Obligations is rescinded or must otherwise be
restored or returned by the Secured Party upon the insolvency, bankruptcy,
dissolution, liquidation or reorganization of the Debtor or upon the appointment
of any intervenor or conservator of, or trustee or similar official for, the
Debtor or any substantial part of its assets, or otherwise, all as though such
payments had not been made.

          18. GOVERNING LAW; SUBMISSION TO JURISDICTION WAIVER OF JURY TRIAL:
              ---------------------------------------------------------------
WAIVER OF DAMAGES. (a) THIS AGREEMENT SHALL BE GOVERNED BY AND INTERPRETED UNDER
-----------------
THE INTERNAL LAWS (AS OPPOSED TO CONFLICT OF LAWS PROVISIONS) AND DECISIONS OF
THE STATE OF MARYLAND, AND ANY DISPUTE ARISING OUT OF, CONNECTED WITH, RELATED
TO, OR INCIDENTAL TO THE RELATIONSHIP ESTABLISHED BETWEEN THE DEBTOR AND THE
SECURED PARTY IN CONNECTION WITH THIS AGREEMENT, AND WHETHER ARISING IN
CONTRACT, TORT, EQUITY OR OTHERWISE, SHALL BE RESOLVED IN ACCORDANCE WITH THE
INTERNAL LAWS (AS OPPOSED TO THE CONFLICTS OF LAWS PROVISIONS) AND DECISIONS OF
THE STATE OF MARYLAND.

              (a) EXCEPT AS PROVIDED IN THE NEXT PARAGRAPH, THE DEBTOR AND THE
SECURED PARTY AGREE THAT ALL DISPUTES BETWEEN THEM ARISING OUT OF, CONNECTED
WITH, RELATED TO, OR INCIDENTAL TO THE RELATIONSHIP ESTABLISHED BETWEEN THEM IN
CONNECTION WITH THIS AGREEMENT, AND WHETHER ARISING IN CONTRACT, TORT, EQUITY,
OR OTHERWISE, SHALL BE RESOLVED ONLY BY STATE OR FEDERAL COURTS LOCATED IN
MARYLAND, BUT THE DEBTOR AND THE SECURED PARTY ACKNOWLEDGE THAT ANY APPEALS FROM
THOSE COURTS MAY HAVE TO BE HEARD BY A FEDERAL COURT LOCATED OUTSIDE OF
MARYLAND. THE DEBTOR WAIVES IN ALL DISPUTES ANY OBJECTION THAT IT MAY HAVE TO
THE LOCATION OF THE COURT CONSIDERING THE DISPUTE INCLUDING, WITHOUT LIMITATION,
ANY OBJECTION TO THE LAYING OF VENUE OR BASED ON THE GROUNDS OF FORUM NON
CONVENIENS.

              (b) THE DEBTOR AGREES THAT THE SECURED PARTY SHALL HAVE THE RIGHT,
TO THE EXTENT PERMITTED BY APPLICABLE LAW, TO PROCEED AGAINST THE DEBTOR OR THE
TrademarkS IN A COURT IN ANY LOCATION REASONABLY SELECTED IN GOOD FAITH TO
ENABLE THE SECURED PARTY TO REALIZE ON THE PATENTS, OR TO ENFORCE A JUDGMENT OR
OTHER

                                      -6-
<PAGE>

COURT ORDER ENTERED IN FAVOR OF THE SECURED PARTY. THE DEBTOR AGREES THAT IT
WILL NOT ASSERT ANY PERMISSIVE COUNTERCLAIMS, SETOFFS OR CROSS CLAIMS IN ANY
PROCEEDING BROUGHT BY THE SECURED PARTY TO REALIZE ON THE PATENTS, OR TO ENFORCE
A JUDGMENT OR OTHER COURT ORDER IN FAVOR OF THE SECURED PARTY. THE DEBTOR WAIVES
ANY OBJECTION THAT IT MAY HAVE TO THE LOCATION OF THE COURT IN WHICH THE SECURED
PARTY HAS COMMENCED A PROCEEDING DESCRIBED IN THIS PARAGRAPH INCLUDING, WITHOUT
LIMITATION, ANY OBJECTION TO THE LAYING OF VENUE OR BASED ON THE GROUNDS OF
FORUM NON CONVENIENS.

              (c) THE DEBTOR AND THE SECURED PARTY EACH WAIVE ANY RIGHT TO HAVE
A JURY PARTICIPATE IN RESOLVING ANY DISPUTE, WHETHER SOUNDING IN CONTRACT, TORT,
OR OTHERWISE ARISING OUT OF, CONNECTED WITH, RELATED TO OR INCIDENTAL TO THE
RELATIONSHIP ESTABLISHED BETWEEN THEM IN CONNECTION WITH THIS AGREEMENT.
INSTEAD, ANY DISPUTES RESOLVED IN COURT WILL BE RESOLVED IN A BENCH TRIAL
WITHOUT A JURY.

              (d) THE DEBTOR (I) AGREES THAT THE SECURED PARTY SHALL NOT HAVE
ANY LIABILITY TO THE DEBTOR (WHETHER SOUNDING IN TORT, CONTRACT OR OTHERWISE)
FOR LOSSES SUFFERED BY THE DEBTOR IN CONNECTION WITH, ARISING OUT OF, OR IN ANY
WAY RELATED TO, THE TRANSACTIONS CONTEMPLATED AND THE RELATIONSHIP ESTABLISHED
BY THIS AGREEMENT, OR ANY ACT, OMISSION OR EVENT OCCURRING IN CONNECTION
THEREWITH, UNLESS IT IS DETERMINED BY A JUDGMENT OF A COURT THAT IS BINDING ON
THE SECURED PARTY (WHICH JUDGMENT SHALL BE FINAL AND NOT SUBJECT TO REVIEW ON
APPEAL), THAT SUCH LOSSES WERE THE RESULT OF ACTS OR OMISSIONS ON THE PART OF
THE SECURED PARTY, CONSTITUTING GROSS NEGLIGENCE OR WILLFUL MISCONDUCT AND (II)
WAIVES, RELEASES AND AGREES NOT TO SUE UPON ANY CLAIM AGAINST THE SECURED PARTY
(WHETHER SOUNDING IN TORT, CONTRACT OR OTHERWISE), EXCEPT A CLAIM BASED UPON
GROSS NEGLIGENCE OR WILLFUL MISCONDUCT. WHETHER OR NOT SUCH DAMAGES ARE RELATED
TO A CLAIM THAT IS SUBJECT TO THE WAIVER EFFECTED ABOVE AND WHETHER OR NOT SUCH
WAIVER IS EFFECTIVE, THE SECURED PARTY SHALL NOT HAVE ANY LIABILITY WITH RESPECT
TO ANY CLAIM FOR, ANY SPECIAL, INDIRECT, CONSEQUENTIAL OR PUNITIVE DAMAGES
SUFFERED BY THE DEBTOR IN CONNECTION WITH, ARISING OUT OF, OR IN ANY WAY RELATED
TO THE TRANSACTIONS CONTEMPLATED OR THE RELATIONSHIP ESTABLISHED BY THIS
AGREEMENT, OR ANY ACT, OMISSION OR EVENT OCCURRING IN CONNECTION THEREWITH.
UNLESS IT IS DETERMINED BY A JUDGMENT OF A COURT THAT IS BINDING ON THE SECURED
PARTY (WHICH JUDGMENT SHALL BE FINAL AND NOT SUBJECT TO REVIEW ON APPEAL), THAT
SUCH DAMAGES WERE THE RESULT OF ACTS OR OMISSIONS ON THE PART OF THE SECURED
PARTY, CONSTITUTING GROSS NEGLIGENCE OR WILLFUL MISCONDUCT.

                                      -7-
<PAGE>

              (e) THE DEBTOR WAIVES ALL RIGHTS OF NOTICE AND HEARING OF ANY KIND
PRIOR TO THE EXERCISE BY THE SECURED PARTY OF ITS RIGHTS FROM AND AFTER THE
OCCURRENCE OF AN EVENT OF DEFAULT TO REPOSSESS THE PATENTS WITH JUDICIAL PROCESS
OR TO REPLEVY, ATTACH OR LEVY UPON THE PATENTS OR OTHER SECURITY FOR THE
OBLIGATIONS. THE DEBTOR WAIVES THE POSTING OF ANY BOND OTHERWISE REQUIRED OF THE
SECURED PARTY IN CONNECTION WITH ANY JUDICIAL PROCESS OR PROCEEDING TO OBTAIN
POSSESSION OF, REPLEVY, ATTACH OR LEVY UPON PATENTS OR OTHER SECURITY FOR THE
OBLIGATIONS, TO ENFORCE ANY JUDGMENT OR OTHER COURT ORDER ENTERED IN FAVOR OF
THE SECURED PARTY, OR TO ENFORCE BY SPECIFIC PERFORMANCE, TEMPORARY RESTRAINING
ORDER, PRELIMINARY OR PERMANENT INJUNCTION THIS AGREEMENT OR ANY OTHER AGREEMENT
OR DOCUMENT BETWEEN THE DEBTOR AND THE SECURED PARTY.

          IN WITNESS WHEREOF, the Debtor has duly executed and delivered this
Agreement under seal as of the day and year first above written.

                                    ENVIRONMENTAL ELEMENTS CORPORATION

                                    By: /s/
                                        ---------------------------------
                                        James B. Sinclair, Vice-President
                                        and Chief Financial Officer

                        CERTIFICATE OF ACKNOWLEDGEMENT

STATE OF MARYLAND             :
                              :
CITY/COUNTY OF _______________:

          Before me, the undersigned, a Notary Public in and for the State
aforesaid, on this 30th day of June, 2000, personally appeared JAMES B.
SINCLAIR, to me known personally or proven to be the Vice-President and Chief
Financial Officer of Environmental Elements Corporation, a Delaware corporation,
and who deposes that said instrument was signed and sealed on behalf of said
Corporation by authority of its Board of Directors, and said JAMES B. SINCLAIR
acknowledged said instrument to be the free act and deed of said Corporation.

                                        ---------------------------------
                                        Notary Public
                                        My commission expires:
                                                              -----------

                                      -8-
<PAGE>

                                 SCHEDULE A TO
                                 ----------
                          TRADEMARK SECURITY AGREEMENT
                                U.S. TRADEMARKS

<TABLE>
<CAPTION>
                                Serial Number or
          Mark                 Registration Number               Docket No.
<S>                            <C>                       <C>
RIGITRODE                           1,441,827            MR717-7
RIGITRODE                           1,900,428            MR717-88
CDS                                 1,959,308            MR717-89 (no file)
FPA                                 2,321,641            MR717-102
AOD                                75/638,370            MR717-118
MODULOK                             1,289,925            (Koppers Co. Law Dept.)
OPTI-CON                            1,307,767            (Koppers Co. Law Dept.)
DIGICON                             1,170,970            (Koppers Co. Law Dept.)
ENVIRONMENTAL ELEMENTS              1,875,137            (Eastwick & Rose, P.A.)
 CORPORATION
</TABLE>
<PAGE>

                                 SCHEDULE A TO
                                 ----------
                          TRADEMARK SECURITY AGREEMENT
                              CANADIAN TRADEMARKS

<TABLE>
<CAPTION>
                                Serial Number or
          Mark                 Registration Number               Docket No.
<S>                            <C>                       <C>
ENELCO                              237,679              TM 1505-1 (Borden Ladner Gervais
                                                         Scott & Aylen)
</TABLE><PAGE>

                                                                    EXHIBIT 10.0

                        DELPHOS CITIZENS BANCORP, INC.
                              EMPLOYMENT AGREEMENT

     This AGREEMENT ("Agreement") is made effective as of April 21, 1997 by and
between Delphos Citizens Bancorp, Inc. (the "Holding Company"), a corporation
organized under the laws of Delaware, with its principal administrative office
at 114 East 3rd Street, Delphos, Ohio 45833 and Joseph R. Reinemeyer (the
"Executive").  Any reference to "Institution" herein shall mean Citizens Bank of
Delphos or any successor thereto.

     WHEREAS, the Holding Company wishes to assure itself of the services of
Executive for the period provided in this Agreement; and

     WHEREAS, the Executive is willing to serve in the employ of the Holding
Company on a full-time basis for said period.

     NOW, THEREFORE, in consideration of the mutual covenants herein contained,
and upon the other terms and conditions hereinafter provided, the parties hereby
agree as follows:

1.   POSITION AND RESPONSIBILITIES.

     During the period of his employment hereunder, Executive agrees to serve as
President and Chief Executive Officer of the Holding Company.  The Executive
shall render administrative and management services to the Holding Company such
as are customarily performed by persons in a similar executive capacity.  During
said period, Executive also agrees to serve, if elected, as an officer and
director of any subsidiary of the Holding Company.

2.   TERMS.

     (a) The period of Executive's employment under this Agreement shall be
deemed to have commenced as of the date first above written and shall continue
for a period of thirty six (36) full calendar months thereafter.  Commencing on
the first day of this Agreement, and continuing at each day thereafter, this
Agreement shall be extended for an additional day each day, until such time as
the Board of Directors of the Holding Company ("Board") or the Executive elects
not to extend the term of the Agreement by giving written notice to the other
party in accordance with Section 8 of this Agreement, in which case the term of
this Agreement shall be fixed and shall end on the third anniversary of the date
of such written notice.

     (b) During the period of Executive's employment hereunder, except for
periods of absence occasioned by illness, reasonable vacation periods, and
reasonable leaves of absence, Executive shall devote substantially all his
business time, attention, skill, and efforts to the faithful performance of his
duties hereunder including activities and services related to the organization,
operation and management of the Holding Company and its, direct or indirect,
subsidiaries

                                       1
<PAGE>

("Subsidiaries") and participation in community and civic organizations;
provided, however, that, with the approval of the Board, as evidenced by a
resolution of such Board, from time to time, Executive may serve, or continue to
serve, on the boards of directors of, and hold any other offices or positions
in, companies or organizations, which, in such Board's judgment, will not
present any conflict of interest with the Holding Company or its Subsidiaries,
or materially affect the performance of Executive's duties pursuant to this
Agreement.

     (c) Notwithstanding anything herein contained to the contrary Executive's
employment with the Holding Company may be terminated by the Holding Company or
Executive during the term of this Agreement, subject to the terms and conditions
of this Agreement.  In the event Executive is Terminated for Cause pursuant to
the terms of the Employment Agreement between the Executive and the Institution
dated April 21, 1997: 1) the Holding Company will only continue to make payments
to Executive for the performance of services for the Holding Company pursuant to
this Agreement and will not make any payments to Executive for any services
performed by Executive in his capacity as an employee of the Institution; and 2)
the Holding Company shall not permit Executive to act in the capacity as an
employee of the Institution or otherwise directly perform services for the
Institution.

3.   COMPENSATION AND REIMBURSEMENT.

     (a) The Executive shall be entitled to a salary from the Holding Company or
its Subsidiaries of not less than $70,000 per year ("Base Salary").  Base Salary
shall include any amounts of compensation deferred by Executive under any
qualified or unqualified plan maintained by the Holding Company and its
Subsidiaries.  Such Base Salary shall be payable bi-weekly.  During the period
of this Agreement, Executive's Base Salary shall be reviewed at least annually;
and must be reviewed at least 90 days following the fiscal year end of the
Company.  Such review shall be conducted by the Board or by a Committee of the
Board delegated such responsibility by the Board. The Committee or the Board may
increase Executive's Base Salary.  The increased Base Salary shall become the
"Base Salary" for purposes of this Agreement.  In addition to the Base Salary
provided in this Section 3(a), the Holding Company shall also provide Executive,
at no premium cost to Executive, with all such other benefits as are provided
uniformly to permanent full-time employees of the Holding Company and its
Subsidiaries.

     (b) The Executive shall be entitled to participate in any employee benefit
plans, arrangements and perquisites substantially equivalent to those in which
Executive was participating or otherwise deriving benefit from immediately prior
to the beginning of the term of this Agreement, and the Holding Company and its
Subsidiaries will not, without Executive's prior written consent, make any
changes in such plans, arrangements or perquisites which would materially
adversely affect Executive's rights or benefits thereunder, except to the extent
that such changes are made applicable to all Holding Company and Institution
employees eligible to participate in such plans, arrangements and perquisites on
a non-discriminatory basis.  Without limiting the generality of the foregoing
provisions of this Subsection (b), Executive shall be entitled to participate in
or receive benefits under any employee benefit plans including, but not limited
to, retirement plans,

                                       2
<PAGE>

supplemental retirement plans, pension plans, profit-sharing plans, health-and-
accident plans, medical coverage or any other employee benefit plan or
arrangement made available by the Holding Company and its Subsidiaries in the
future to its senior executives and key management employees, subject to and on
a basis consistent with the terms, conditions and overall administration of such
plans and arrangements. Executive shall be entitled to incentive compensation
and bonuses as provided in any plan of the Holding Company and its Subsidiaries
in which Executive is eligible to participate. Nothing paid to the Executive
under any such plan or arrangement will be deemed to be in lieu of other
compensation to which the Executive is entitled under this Agreement.

     (c) In addition to the Base Salary provided for by paragraph (a) of this
Section 3 and other compensation provided for by paragraph (b) of this Section
3, the Holding Company shall pay or reimburse Executive for all reasonable
travel and other reasonable expenses incurred in the performance of Executive's
obligations under this Agreement and may provide such additional compensation in
such form and such amounts as the Board may from time to time determine.

4.   PAYMENTS TO EXECUTIVE UPON AN EVENT OF TERMINATION.

     (a) Upon the occurrence of an Event of Termination (as herein defined)
during the Executive's term of employment under this Agreement, the provisions
of this Section shall apply. As used in this Agreement, an "Event of
Termination" shall mean and include any one or more of the following:  (i) the
termination by the Holding Company of Executive's full-time employment hereunder
for any reason other than termination governed by Section 5(a) hereof, or for
Cause, as defined in Section 7 hereof; (ii) Executive's resignation from the
Holding Company's employ upon any (A) failure to elect or reelect or to appoint
or reappoint Executive as President and Chief Executive Officer, unless
consented to by the Executive, (B) a material change in Executive's function,
duties, or responsibilities with the Holding Company or its Subsidiaries, which
change would cause Executive's position to become one of lesser responsibility,
importance, or scope from the position and attributes thereof described in
Section 1, above, unless consented to by the Executive, (C) a relocation of
Executive's principal place of employment by more than 25 miles from its
location at the effective date of this Agreement,unless consented to by the
Executive, (D) a material reduction in the benefits and perquisites to the
Executive from those being provided as of the effective date of this Agreement,
unless consented to by the Executive, (E) a liquidation or dissolution of the
Holding Company or the Institution, or (F) breach of this Agreement by the
Holding Company.  Upon the occurrence of any event described in clauses (A),
(B), (C), (D), (E) or (F), above, Executive shall have the right to elect to
terminate his employment under this Agreement by resignation upon not less than
sixty (60) days prior written notice given within six full calendar months after
the event giving rise to said right to elect.

     (b) Upon the occurrence of an Event of Termination, on the Date of
Termination, as defined in Section 8, the Holding Company shall be obligated to
pay Executive, or, in the event of his subsequent death, his beneficiary or
beneficiaries, or his estate, as the case may be, an amount equal to the sum of
(i) the amount of the remaining payments that the Executive would have earned if
he had continued his employment with the Institution during the remaining term
of this Agreement

                                       3
<PAGE>

at the Executive's Base Salary at the Date of Termination; and (ii) the amount
equal to the annual contributions that would have been made on Executive's
behalf to any employee benefit plans of the Institution or the Holding Company
during the remaining term of this Agreement based on contributions made (on an
annualized basis) at the Date of Termination. At the election of the Executive,
which election is to be made prior to an Event of Termination, such payments may
be made in a lump sum. In the event that no election is made, payment to the
Executive will be made on a monthly basis in approximately equal installments
during the remaining term of the Agreement. Such payments shall not be reduced
in the event the Executive obtains other employment following termination of
employment.

     (c) Upon the occurrence of an Event of Termination, the Holding Company
will cause to be continued life, health and disability coverage substantially
equivalent to the coverage maintained by the Holding Company or its Subsidiaries
for Executive prior to his termination at no premium cost to the Executive.
Such coverage shall cease upon the expiration of the remaining term of this
Agreement.

5.   CHANGE IN CONTROL.

     (a) For purposes of this Agreement, a "Change in Control" of the Holding
Company or the Institution shall mean an event of a nature that: (i) would be
required to be reported in response to Item 1(a) of the current report on Form
8-K, as in effect on the date hereof, pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934 (the "Exchange Act"); or (ii) results in a
Change in Control of the Institution or the Holding Company within the meaning
of the Home Owners' Loan Act of 1933, as amended, the Federal Deposit Insurance
Act, and the Rules and Regulations promulgated by the Office of Thrift
Supervision (or its predecessor agency), as in effect on the date hereof; or
(iii) without limitation such a Change in Control shall be deemed to have
occurred at such time as (A) any "person" (as the term is used in Sections 13(d)
and 14(d) of the Exchange Act) is or becomes the "beneficial owner" (as defined
in Rule 13d-3 under the Exchange Act), directly or indirectly, of voting
securities of the Institution or the Holding Company representing 20% or more of
the Institution's or the Holding Company's outstanding voting securities or
right to acquire such securities except for any voting securities of the
Institution purchased by the Holding Company and any voting securities purchased
by any employee benefit plan of the Holding Company or its Subsidiaries, or (B)
individuals who constitute the Board on the date hereof (the "Incumbent Board")
cease for any reason to constitute at least a majority thereof, provided that
any person becoming a director subsequent to the date hereof whose election was
approved by a vote of at least three-quarters of the directors comprising the
Incumbent Board, or whose nomination for election by the Company's stockholders
was approved by a Nominating Committee solely composed of members which are
Incumbent Board members, shall be, for purposes of this clause (B), considered
as though he were a member of the Incumbent Board, or (C) a plan of
reorganization, merger, consolidation, sale of all or substantially all the
assets of the Institution or the Holding Company or similar transaction occurs
or is effectuated in which the Institution or Holding Company is not the
resulting entity; or (D) a proxy statement shall be distributed soliciting
proxies from stockholders of the Holding Company, by someone other than the
current management of the Holding Company,

                                       4
<PAGE>

seeking stockholder approval of a plan of reorganization, merger or
consolidation of the Holding Company or Institution with one or more
corporations as a result of which the outstanding shares of the class of
securities then subject to such plan or transaction are exchanged for or
converted into cash or property or securities not issued by the Institution or
the Holding Company shall be distributed, or (E) a tender offer is made for 20%
or more of the voting securities of the Institution or Holding Company then
outstanding.

     (b) If a Change in Control has occurred pursuant to Section 5(a) or the
Board has determined that a Change in Control has occurred, Executive shall be
entitled to the benefits provided in paragraphs (c) and (d), of this Section 5
upon his subsequent termination of employment at any time during the term of
this Agreement due to (i) Executive's dismissal, or (ii) Executive's voluntary
resignation following any material demotion, loss of title, office or
significant authority or responsibility, material reduction in the annual
compensation or benefits or relocation of his principal place of employment by
more than 25 miles from its location immediately prior to the change in
control), unless such termination is because of his death, or termination for
Cause.

     (c) Upon the Executive's entitlement to benefits pursuant to Section 5(b),
the Holding Company shall pay Executive, or in the event of his subsequent
death, his beneficiary or beneficiaries, or his estate, as the case may be, as
severance pay or liquidated damages, or both, a sum equal to the greater of:
(i) the payments due for the remaining term of the Agreement; or (ii) three (3)
times Executive's average annual compensation for the five (5) preceding taxable
years. Such annual compensation shall include Base Salary, commissions, bonuses,
contributions on behalf of Executive to any pension and profit sharing plan,
severance payments, directors or committee fees and fringe benefits paid or to
be paid to the Executive during such years.  At the election of the Executive,
which election is to be made prior to a Change in Control, such payment may be
made in a lump sum.  In the event that no election is made, payment to the
Executive will be made on a monthly basis in approximately equal installments
during the remaining term of the Agreement. Such payments shall not be reduced
in the event Executive obtains other employment following termination of
employment.

     (d) Upon the Executive's entitlement to benefits pursuant to Section 5(b),
the Company will cause to be continued life, health and disability coverage
substantially equivalent to the coverage maintained by the Institution for
Executive at no premium cost to Executive prior to his severance. Such coverage
and payments shall cease upon the expiration of thirty six (36) months following
the Change in Control.

                                       5
<PAGE>

6.   CHANGE OF CONTROL RELATED PROVISIONS.

     (a) Notwithstanding the paragraphs of Section 5, in the event that:

          (i) the aggregate payments or benefits to be made or afforded to
     Executive, which are deemed to be parachute payments as defined in Section
     280G of the Internal Revenue Code of 1986, as amended (the "Code") or any
     successor thereof, (the "Termination Benefits") would be deemed to include
     an "excess parachute payment" under Section 280G of the Code; and

          (ii) if such Termination Benefits were reduced to an amount (the "Non-
     Triggering Amount"), the value of which is one dollar ($1.00) less than an
     amount equal to three (3) times Executive's "base amount," as determined in
     accordance with said Section 280G and the Non-Triggering Amount less the
     product of the marginal rate of any applicable state and federal income tax
     and the Non Triggering Amount would be greater than the aggregate value of
     the Termination Benefits (without such reduction) minus (i) the amount of
     tax required to be paid by the Executive thereon by Section 4999 of the
     Code and further minus (ii) the product of the Termination Benefits and the
     marginal rate of any applicable state and federal income tax,

then the Termination Benefits shall be reduced to the Non-Triggering Amount.
The allocation of the reduction required hereby among the Termination Benefits
shall be determined by the Executive.

7.   TERMINATION FOR CAUSE.

     The term "Termination for Cause" shall mean termination because of a
material loss to the Holding Company or one of its Subsidiaries caused by the
Executive's intentional failure to perform stated duties, personal dishonesty,
willful violation of any law, rule, regulation (other than traffic violations or
similar offenses), final cease and desist order or material breach of any
provision of this Agreement.  For purposes of this Section, no act, or the
failure to act, on Executive's part shall be "willful" unless done, or omitted
to be done, not in good faith and without reasonable belief that the action or
omission was in the best interest of the Holding Company or its Subsidiaries.
Notwithstanding the foregoing, Executive shall not be deemed to have been
terminated for Cause unless and until there shall have been delivered to him a
Notice of Termination which shall include a copy of a resolution duly adopted by
the affirmative vote of not less than three-fourths of the members of the Board
at a meeting of the Board called and held for that purpose (after reasonable
notice to Executive and an opportunity for him, together with counsel, to be
heard before the Board), finding that in the good faith opinion of the Board,
Executive was guilty of conduct justifying termination for Cause and specifying
the particulars thereof in detail.  The Executive shall not have the right to
receive compensation or other benefits for any period after the Date of
Termination. During the period beginning on the date of the Notice of
Termination for Cause pursuant to Section 8 hereof through the Date of
Termination, stock options and related limited rights granted to

                                       6
<PAGE>

Executive under any stock option plan shall not be exercisable nor shall any
unvested awards granted to Executive under any stock benefit plan of the Holding
Company or its Subsidiaries vest. At the Date of Termination, such stock options
and related limited rights and such unvested awards shall become null and void
and shall not be exercisable by or delivered to Executive at any time subsequent
to such Date of Termination for Cause.

8.   NOTICE.

     (a) Any purported termination by the Holding Company or by Executive shall
be communicated by Notice of Termination to the other party hereto.  For
purposes of this Agreement, a "Notice of Termination" shall mean a written
notice which shall indicate the specific termination provision in this Agreement
relied upon and shall set forth in reasonable detail the facts and circumstances
claimed to provide a basis for termination of Executive's employment under the
provision so indicated.

     (b) "Date of Termination" shall mean the date specified in the Notice of
Termination (which, in the case of a Termination for Cause, shall not be less
than ten (10) days from the date such Notice of Termination is given).

     (c) If, within thirty (30) days after any Notice of Termination is given,
the party receiving such Notice of Termination notifies the other party that a
dispute exists concerning the termination, except upon the occurrence of a
Change in Control and voluntary termination by the Executive in which case the
Date of Termination shall be the date specified in the Notice, the Date of
Termination shall be the date on which the dispute is finally determined, either
by mutual written agreement of the parties, by a binding arbitration award, or
by a final judgment, order or decree of a court of competent jurisdiction (the
time for appeal therefrom having expired and no appeal having been perfected)
and provided further that the Date of Termination shall be extended by a notice
of dispute only if such notice is given in good faith and the party giving such
notice pursues the resolution of such dispute with reasonable diligence.
Notwithstanding the pendency of any such dispute, the Company will continue to
pay Executive his full compensation in effect when the notice giving rise to the
dispute was given (including, but not limited to, Base Salary) and continue him
as a participant in all compensation, benefit and insurance plans in which he
was participating when the notice of dispute was given, until the dispute is
finally resolved in accordance with this Agreement.  Amounts paid under this
Section are in addition to all other amounts due under this Agreement and shall
not be offset against or reduce any other amounts due under this Agreement.

                                       7
<PAGE>

9.   POST-TERMINATION OBLIGATIONS.

      All payments and benefits to Executive under this Agreement shall be
subject to Executive's compliance with this Section 9 for one (1) full year
after the earlier of the expiration of this Agreement or termination of
Executive's employment with the Holding Company.  Executive shall, upon
reasonable notice, furnish such information and assistance to the Holding
Company as may reasonably be required by the Holding Company in connection with
any litigation in which it or any of its subsidiaries or affiliates is, or may
become, a party.

10.  NON-COMPETITION.

     (a) Upon any termination of Executive's employment hereunder pursuant to
Section 4 hereof, Executive agrees not to compete with the Holding Company or
its Subsidiaries for a period of one (1) year following such termination in any
city, town or county in which the Executive's normal business office is located
and the Holding Company or any of its Subsidiaries has an office or has filed an
application for regulatory approval to establish an office, determined as of the
effective date of such termination, except as agreed to pursuant to a resolution
duly adopted by the Board.  Executive agrees that during such period and within
said cities, towns and counties, Executive shall not work for or advise, consult
or otherwise serve with, directly or indirectly, any entity whose business
materially competes with the depository, lending or other business activities of
the Holding Company or its Subsidiaries.  The parties hereto, recognizing that
irreparable injury will result to the Holding Company or its Subsidiaries, its
business and property in the event of Executive's breach of this Subsection
10(a) agree that in the event of any such breach by Executive, the Holding
Company or its Subsidiaries, will be entitled, in addition to any other remedies
and damages available, to an injunction to restrain the violation hereof by
Executive, Executive's partners, agents, servants, employees and all persons
acting for or under the direction of Executive. Executive represents and admits
that in the event of the termination of his employment pursuant to Section 7
hereof, Executive's experience and capabilities are such that Executive can
obtain employment in a business engaged in other lines and/or of a different
nature than the Holding Company or its Subsidiaries, and that the enforcement of
a remedy by way of injunction will not prevent Executive from earning a
livelihood.  Nothing herein will be construed as prohibiting the Holding Company
or its Subsidiaries from pursuing any other remedies available to the Holding
Company or its Subsidiaries for such breach or threatened breach, including the
recovery of damages from Executive.

     (b) Executive recognizes and acknowledges that the knowledge of the
business activities and plans for business activities of the Holding Company and
its Subsidiaries as it may exist from time to time, is a valuable, special and
unique asset of the business of the  Holding Company and its Subsidiaries.
Executive will not, during or after the term of his employment, disclose any
knowledge of the past, present, planned or considered business activities of the
Holding Company and its Subsidiaries thereof to any person, firm, corporation,
or other entity for any reason or purpose whatsoever, unless expressly
authorized by the Board of Directors or required by law. Notwithstanding the
foregoing, Executive may disclose any knowledge of banking, financial and/or

                                       8
<PAGE>

economic principles, concepts or ideas which are not solely and exclusively
derived from the business plans and activities of the Holding Company.  In the
event of a breach or threatened breach by the Executive of the provisions of
this Section, the Holding Company will be entitled to an injunction restraining
Executive from disclosing, in whole or in part, the knowledge of the past,
present, planned or considered business activities of the Holding Company or its
Subsidiaries or from rendering any services to any person, firm, corporation,
other entity to whom such knowledge, in whole or in part, has been disclosed or
is threatened to be disclosed.  Nothing herein will be construed as prohibiting
the Holding Company from pursuing any other remedies available to the Holding
Company for such breach or threatened breach, including the recovery of damages
from Executive.

11.  SOURCE OF PAYMENTS.

     (a) All payments provided in this Agreement shall be timely paid in cash or
check from the general funds of the Holding Company subject to Section 11(b).

     (b)  Notwithstanding any provision herein to the contrary, to the extent
that payments and benefits, as provided by this Agreement, are paid to or
received by Executive under the Employment Agreement dated April 21, 1997
between Executive and the Institution, such compensation payments and benefits
paid by the Institution will be subtracted from any amount due simultaneously to
Executive under similar provisions of this Agreement.

12.  EFFECT ON PRIOR AGREEMENTS AND EXISTING BENEFITS PLANS.

     This Agreement contains the entire understanding between the parties hereto
and supersedes any prior employment agreement between the Holding Company or any
predecessor of the Holding Company and Executive, except that this Agreement
shall not affect or operate to reduce any benefit or compensation inuring to the
Executive of a kind elsewhere provided.  No provision of this Agreement shall be
interpreted to mean that Executive is subject to receiving fewer benefits than
those available to him without reference to this Agreement.

13.  NO ATTACHMENT.

     (a) Except as required by law, no right to receive payments under this
Agreement shall be subject to anticipation, commutation, alienation, sale,
assignment, encumbrance, charge, pledge, or hypothecation, or to execution,
attachment, levy, or similar process or assignment by operation of law, and any
attempt, voluntary or involuntary, to affect any such action shall be null,
void, and of no effect.

     (b) This Agreement shall be binding upon, and inure to the benefit of,
Executive and the Holding Company and their respective successors and assigns.

                                       9
<PAGE>

14.  MODIFICATION AND WAIVER.

     (a) This Agreement may not be modified or amended except by an instrument
in writing signed by the parties hereto.

     (b) No term or condition of this Agreement shall be deemed to have been
waived, nor shall there be any estoppel against the enforcement of any provision
of this Agreement, except by written instrument of the party charged with such
waiver or estoppel.  No such written waiver shall be deemed a continuing waiver
unless specifically stated therein, and each such waiver shall operate only as
to the specific term or condition waived and shall not constitute a waiver of
such term or condition for the future as to any act other than that specifically
waived.

15.  SEVERABILITY.

     If, for any reason, any provision of this Agreement, or any part of any
provision, is held invalid, such invalidity shall not affect any other provision
of this Agreement or any part of such provision not held so invalid, and each
such other provision and part thereof shall to the full extent consistent with
law continue in full force and effect.

16.  HEADINGS FOR REFERENCE ONLY.

     The headings of sections and paragraphs herein are included solely for
convenience of reference and shall not control the meaning or interpretation of
any of the provisions of this Agreement.

17.  GOVERNING LAW.

     This Agreement shall be governed by the laws of the State of Delaware,
unless otherwise specified herein.

18.  ARBITRATION.

     Any dispute or controversy arising under or in connection with this
Agreement shall be settled exclusively by arbitration, conducted before a panel
of three arbitrators sitting in a location selected by the Executive within
fifty (50) miles from the location of the Institution, in accordance with the
rules of the American Arbitration Association then in effect.  Judgment may be
entered on the arbitrator's award in any court having jurisdiction; provided,
however, that Executive shall be entitled to seek specific performance of his
right to be paid until the Date of Termination during the pendency of any
dispute or controversy arising under or in connection with this Agreement.

                                       10
<PAGE>

     In the event any dispute or controversy arising under or in connection with
Executive's termination is resolved in favor of the Executive, whether by
judgment, arbitration or settlement, Executive shall be entitled to the payment
of all back-pay, including salary, bonuses and any other cash compensation,
fringe benefits and any compensation and benefits due Executive under this
Agreement.

19.  PAYMENT OF LEGAL FEES.

     All reasonable legal fees paid or incurred by Executive pursuant to any
dispute or question of interpretation relating to this Agreement shall be paid
or reimbursed by the Holding Company, if Executive is successful pursuant to a
legal judgment, arbitration or settlement.

20.  INDEMNIFICATION.

     The Holding Company shall provide Executive (including his heirs, executors
and administrators) with coverage under a standard directors' and officers'
liability insurance policy at its expense, or in lieu thereof, shall indemnify
Executive (and his heirs, executors and administrators) to the fullest extent
permitted under Delaware law against all expenses and liabilities reasonably
incurred by him in connection with or arising out of any action, suit or
proceeding in which he may be involved by reason of his having been a director
or officer of the Holding Company (whether or not he continues to be a director
or officer at the time of incurring such expenses or liabilities), such expenses
and liabilities to include, but not be limited to, judgments, court costs and
attorneys' fees and the cost of reasonable settlements.

21.  SUCCESSOR TO THE HOLDING COMPANY.

     The Holding Company shall require any successor or assignee, whether direct
or indirect, by purchase, merger, consolidation or otherwise, to all or
substantially all the business or assets of the Association or the Holding
Company, expressly and unconditionally to assume and agree to perform the
Holding Company's obligations under this Agreement, in the same manner and to
the same extent that the Holding Company would be required to perform if no such
succession or assignment had taken place.

                                       11
<PAGE>

                                   SIGNATURES

     IN WITNESS WHEREOF, Delphos Citizens Bancorp, Inc., has caused this
Agreement to be executed and its seal to be affixed hereunto by its duly
authorized officer and its directors, and Executive has signed this Agreement,
on the 21st day of April, 1997.

ATTEST:                             DELPHOS CITIZENS BANCORP, INC.

                                    By: /s/ P. Douglas Harter
-----------------------------          -----------------------------
Secretary

          [SEAL]

WITNESS:

                                    By: /s/ Joseph R. Reinemeyer
----------------------                  ------------------------------
                                        Executive

                                       12
<PAGE>

                                FIRST AMENDMENT
                         DELPHOS CITIZENS BANCORP, INC.
                              EMPLOYMENT AGREEMENT

     WHEREAS, the Delphos Citizens Bancorp, Inc. (the "Company") and Joseph R.
Reinemeyer ("Executive") entered into an employment agreement effective April
21, 1997 (the "Agreement");

     WHEREAS, the Company and Executive desire to amend the Agreement to clarify
the definition of "average annual compensation" and to provide for tax
indemnification to Executive in the event necessary as a result of a change in
control; and

     WHEREAS, Section 14 of the Agreement provides that the Agreement may be
modified by a written instrument signed by the parties to the Agreement.

     NOW, THEREFORE, the Company and Executive agree to amend the Agreement,
effective immediately, as follows:

                                    ITEM ONE

Section 5(c) of the Agreement is amended by deleting the second sentence thereof
in its entirety and replacing it with the following language:

     "In determining "average annual compensation," annual compensation shall
     include Base Salary and any other taxable income, including but not limited
     to amounts related to the granting, vesting or exercise of restricted stock
     or stock option awards, commissions, bonuses, severance payments,
     retirement benefits, director or committee fees and fringe benefits paid or
     to be paid to Executive or paid for Executive's benefit during any
     applicable year, as well as pension, profit sharing or other tax-qualified
     retirement plan contributions or benefits (whether or not taxable)
     contributed or accrued on behalf of Executive for any applicable year."

                                  SECOND ITEM

Section 6 of the Agreement shall be deleted in its entirety and replaced with
the following new Section 6:

     6.   CHANGE IN CONTROL RELATED PROVISIONS.

          (a) Notwithstanding any other provision of this Agreement, for any
     taxable year in which Executive shall be liable for the payment of an
     excise tax under Section 4999 of the Internal Revenue Code of 1986, as
     amended, (or any successor provision thereto), with respect to any payment
     in the nature of the compensation
<PAGE>

     made by the Holding Company or the Institution to (or for the benefit of)
     Executive pursuant to this Agreement or otherwise, the Holding Company
     shall pay to Executive an amount determined under the following formula:

          An amount equal to:  (E x P) + X

     WHERE:

          X  =              E x P
               --------------------------------
               1 - [(FI x (1 - SLI)) + SLI + E]

          E  =    the rate at which the excise tax is assessed under Section
                  4999 of the Code;

          P  =    the amount with respect to which such excise tax is assessed,
                  determined without regard to this Section 2;

          FI =    the highest marginal rate of federal income, employment, and
                  other taxes (other than taxes imposed under Section 4999 of
                  the Code) applicable to Executive for the taxable year in
                  question; and

          SLI  =  the sum of the highest marginal rates of income and payroll
                  tax applicable to Executive under applicable state and local
                  laws for the taxable year in question.

     With respect to any payment in the nature of compensation that is made to
     (or for the benefit of) Executive under the terms of this Agreement or
     otherwise and on which an excise tax under Section 4999 of the Code will be
     assessed, the payment determined under this Section 6 shall be made to
     Executive on the earliest of (i) the date the Holding Company is required
     to withhold such tax, (ii) the date the tax is required to be paid by
     Executive, or (iii) at the time of the Change in Control.  It is the
     intention of the parties that the Holding Company provide Executive with a
     full tax gross-up under the provisions of this Agreement, so that on a net
     after-tax basis, the result to Executive shall be the same as if the excise
     tax under Section 4999 (or any successor provisions) of the Code had not
     been imposed.  The tax gross-up may be adjusted if alternative minimum tax
     rules are applicable to Executive.

          (b) Notwithstanding the foregoing, if it shall subsequently be
     determined in a final judicial determination or a final administrative
     settlement to which Executive is a party that the excess parachute payment
     as defined in Section 4999 of the Code, reduced as described above, is more
     than the amount determined as "P",
<PAGE>

     above (such greater amount being hereafter referred to as the
     "Determinative Excess Parachute Payment") then the Holding Company's
     independent accountants shall determine the amount (the "Adjustment
     Amount"), the Holding Company must pay to the Executive, in order to put
     the Executive (or the Holding Company, as the case may be) in the same
     position as the Executive (or the Holding Company, as the case may be)
     would have been if the amount determined as "P" above had been equal to the
     Determinative Excess Parachute Payment. In determining the Adjustment
     Amount, the independent accountants shall take into account any and all
     taxes (including any penalties and interest) paid by or for Executive or
     refunded to Executive or for Executive's benefit. As soon as practicable
     after the Adjustment Amount has been so determined, the Holding Company
     shall pay the Adjustment Amount to Executive.

          (c) In each calendar year that Executive receives payments or benefits
     under this Agreement, Executive shall report on his state and federal
     income tax returns such information as is consistent with the determination
     made by the independent accountants of the Holding Company as described
     above.  The Holding Company shall indemnify and hold Executive harmless
     from any and all losses, costs and expenses (including without limitation,
     reasonable attorney's fees, interest, fines and penalties) which Executive
     incurs as a result of so reporting such information. Executive shall
     promptly notify the Holding Company in writing whenever the Executive
     receives notice of the Bank of a judicial or administrative proceeding,
     formal or informal, in which the federal tax treatment under Section 4999
     of the Code of any amount paid or payable under this Supplemental Agreement
     is being reviewed or is in dispute.  The Holding Company shall assume
     control at its expense over all legal and accounting matters pertaining to
     such federal tax treatment (except to the extent necessary or appropriate
     for Executive to resolve any such proceeding with respect to any matter
     unrelated to amounts paid or payable pursuant to this contract) and
     Executive shall cooperate fully with the Holding Company in any such
     proceeding.  Executive shall not enter into any compromise or settlement or
     otherwise prejudice any rights the Holding Company may have in connection
     therewith without prior consent to the Holding Company."
<PAGE>

IN WITNESS WHEREOF, the Company has caused this Amendment to be executed and its
seal to be affixed hereunto by its duly authorized officer and its directors,
and Executive has signed this Amendment, on the 20/th/ day of December, 1999.

ATTEST:                                 DELPHOS CITIZENS BANCORP, INC.

/s/ Gary G. Ricker                      By:  /s/ Nancy C. Rumschlag
--------------------------------            -------------------------------
Secretary

          [SEAL]

WITNESS:

/s/ Peggy I. Grothause                  By: /s/ Joseph R. Reinemeyer
--------------------------------           ---------------------------------
                                           Executive

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