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                                                                   EXHIBIT 10.35

                      SUBLEASE OF COMMERCIAL OFFICE SPACE

                              Commercial Park West
                          2300 Englert Drive, Suite B
                                Durham, NC 27713

This sublease ("Sublease"), dated July 30, 1999 between Digital Recorders,
Inc., a North Carolina Corporation, ("Sublessor"), whose mailing address is
P.O. Box 14068, RTP, NC, 27709 and Cartesian Technologies, Inc. ("Sublessee"),
whose principal office is 17781 Sky Park Circle, Irvine, California, 92614.

1.   In consideration of the mutual covenants contained herein, Sublessor
     hereby leases to Sublessee, and Sublessee hereby leases from Sublessor,
     6665 square feet of commercial office space, which is in the building
     located at 23000 Englert Drive, Suite B, Durham, NC. The Subleased Premises
     are set forth on the diagram attached hereto as Exhibit "A".

2.   The term of this Sublease shall commence on September 1, 1999 and shall
     terminate on September 1, 2002 or such earlier date as occurs upon
     termination of the Prime Lease (defined below).

3.   Sublessee acknowledges that Sublessor is the tenant of the Subleased
     Premises by virtue of that certain Commercial Lease by and between Realmark
     Commercial LP as Landlord, and Sublessor, as the Tenant (the "Prime Lease",
     a copy of which is attached hereto as Exhibit "B"). Sublessee hereby agrees
     to be bound by and comply with all terms and provisions of the Prime Lease
     as if such terms and provisions were set forth in this Sublease and as if
     Sublessor were the Landlord and Sublessee were the Tenant under the Prime
     Lease, but only to the extent such terms and provisions are not in conflict
     with this Sublease.

4.   Sublessee agrees to pay Sublessor monthly rent during the term of this
     sublease in accordance to Sublessor lease agreement (See Exhibit C, Rent
     Schedule attached), and then payable in advance of the 5th day of each
     month from the commencement date through the end of the lease in the amount
     set forth in Exhibit C as attached. Sublessor and Sublessee agree that
     Sublessor shall be exclusively liable for the monthly rental set forth in
     the Prime Lease during the term of this Sublease. Further, extension of
     sublease on a month-to-month basis will take effect after Sept. 1, 2002.

     Notice to continue sublease on a month-to-month basis shall be given in
     writing 30 days prior to extension/termination. Checks for rent shall be
     made payable to Digital Recorders, Inc., 4018 Patriot Drive, One Park
     Center, Suite 100, P.O. Box 14068, Research Triangle Park, NC, 27709-4068.

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 5.  Sublessee shall deposit with Sublessor upon execution of this Sublease the
     sum of Five Thousand Dollars ($5,000.00) as security for Sublessee's
     faithful performance of Sublessee's obligations hereunder ("Security
     Deposit"). If Sublessee fails to pay rent or other charges when due under
     this Sublease, or fails to perform any of its other obligations hereunder,
     Sublessor may use or apply all or any other sum for which Sublessor may
     become obligated by reason of Sublessee's default or breach, or for any
     loss or damage sustained by Sublessor as a result of Sublessee's default or
     breach. Within ten (10) days after the agreement has expired, or Sublessee
     has vacated the Premises the security deposit or so much thereof as has not
     theretofore been applied by Sublessor, shall be returned to Sublessee.

 6.  Sublessee shall not further assign or sublet this Sublease without the
     express written advance approval of Sublessor, which agreement to approve
     assignment or sublet shall not be unreasonably withheld, conditioned or
     denied by Sublessor.

 7.  In the event of default by Sublessee under this Sublease, Sublessor shall
     be entitled to exercise with respect to this Sublease the same rights and
     remedies of the landlord as set forth in the Prime Lease.

 8.  Sublessee shall secure and maintain its own insurance as per Section 16 of
     the master lease. Such insurance shall name Realmark Commercial LLC
     Sublessor as additional insured.

 9.  This Sublease is contingent upon demonstration of financial responsibility
     by Sublessee including, but not limited to, submission to Sublessor of
     financial statements, receipt of which is hereby acknowledged. The
     effective date of this lease is the date of occupancy by Sublessee of the
     leased premises.

10.  This Sublease sets forth all the covenants, promises, conditions,
     agreements and understandings between Sublessor and Sublessee concerning
     the Subleased Premises. No alterations, amendments, or additions to this
     Sublease shall be binding upon Sublessor or Sublessee unless reduced to
     writing signed by them and mutually delivered between them and then only if
     same shall be approved by the landlord under the Prime Lease.

11.  Indemnification of Sublessor. Sublessee covenants and agrees that Sublessor
     shall not be liable for any injuries or damages to persons, entities, or
     property from any cause whatsoever by reason of the use, occupation,
     control or enjoyment of the Subleased Premises by Sublessee, or any person
     entering thereon for any reason or invited (other than Sublessor or its
     agents), suffered or permitted by Sublessee to go or be thereon or holding
     under Sublessee at any time during the term of this Sublease, and Sublessee
     will save and hold harmless Sublessor from and against any and all
     liability, penalties, damages, expenses
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    and judgements whatsoever on account of such injuries or damages. The
    injuries and damages referred to in this paragraph shall include, without
    limiting the generality of the preceding provisions, to injuries, damages
    and mechanic's liens arising directly or indirectly out of any demolition,
    repairs, restoration, reconstruction, changes, alterations and construction
    which Sublessee may make or cause to be made upon the Subleased Premises or
    any part thereof. Sublessee, at Sublessee's expense, agrees to employ legal
    counsel to defend any action for which any claim shall be made for injuries
    or damages commenced against Sublessor by reason of the foregoing.

12. This sublease is between Sublessor and Sublessee only, and it does not in
    any manner confer any rights or affect any obligation of Sublessor under
    the prime lease.

13. The Sublease shall be subject to approval by Landlord.

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IN WITNESS WHEREOF, Sublessor has executed this Sublease on the ___ day of
______, 1999.

                                           SUBLESSOR:

                                           BY: /s/  Michael Surmanian
                                               --------------------------
                                           TITLE: Vice President, Secretary
                                               --------------------------

ATTEST: /s/
        -----------------------

IN WITNESS WHEREOF, Sublessee has executed this Sublease on the 3 day of Sept,
1999.

                                           SUBLESSEE:

                                           BY: /s/  Lawrence A. Taylor
                                               --------------------------
                                           TITLE: CFO & Secretary
                                               --------------------------

ATTEST:
        ----------------------

ACKNOWLEDGED: LANDLORD

BY: /s/
   ---------------------------
TITLE: Director of Commercial
       -----------------------
       Property
       -----------------------<PAGE>
                                                                    EXHIBIT 4(b)

                                  AMENDMENT TO
                      AMENDED AND RESTATED RIGHTS AGREEMENT

         This Amendment to Amended and Restated Rights Agreement (the
"Amendment") is made as of December 13, 2001 by and among Detrex Corporation, a
Michigan corporation (the "Company") and State Street Bank & Trust Company, a
Massachusetts Trust Company ("State Street"), and EquiServe Trust Company, N.A.
("EquiServe").

         WHEREAS, the Company and State Street entered into that certain Amended
and Restated Rights Agreement, dated as of April 27, 2000 (the "Agreement");

         WHEREAS, State Street desires to appoint EquiServe as the Rights Agent;
and

         WHEREAS, the parties desire to amend Section 21 of the Agreement and to
recognize EquiServe as a successor Rights Agent.

         NOW, THEREFORE, in consideration of the premises and the mutual
agreements herein set forth, the parties hereby agree as follows:

         1.       This Amendment shall be effective as of December 13, 2001 and
         all defined terms and definitions in the Agreement shall be the same in
         the Amendment except as specifically revised by the Amendment.

         2.       Section 3(c) of the Agreement is hereby amended to add, at the
         end of the legend that appears on page 7:

                  "EquiServe Trust Company, N.A. is the successor Rights Agent
                  to the Rights Agreement."

         3.       Section 21 of the Agreement is hereby deleted in its entirety
         and replaced with the following:

                  "SECTION 21. Change of Rights Agent. The Rights Agent or any
         successor Rights Agent may resign and be discharged from its duties
         under this Agreement upon 30 days' notice in writing mailed to the
         Company and to each transfer agent of the Preferred Stock and the
         Company Common Stock by registered or certified mail and to the holders
         of the Rights Certificates by first-class mail. The Company may remove
         the Rights Agent or any successor Rights Agent upon 30 days' notice in
         writing mailed to the Rights Agent or successor Rights Agent, as the
         case may be, and to each transfer agent of the Preferred Stock and the
         Company Common Stock by registered or certified mail, and to the
         holders of the Rights Certificates by first-class mail. If the Rights
         Agent shall resign or be removed or shall otherwise become incapable of
         acting, the Company shall appoint a successor to the Rights Agent. If
         the Company shall fail to make such appointment
<PAGE>
         within a period of 30 days after giving notice of such removal or after
         it has been notified in writing of such resignation or incapacity by
         the resigning or incapacitated Rights Agent or by the holder of a
         Rights Certificate (who shall, with such notice, submit such holder's
         Rights Certificate for inspection by the Company), then the registered
         holder of any Rights Certificate may apply to any court of competent
         jurisdiction for the appointment of a new Rights Agent. Any successor
         Rights Agent, whether appointed by the Company or by such a court,
         shall be a corporation or trust company organized and doing business
         under the laws of the United States, in good standing, which is
         authorized under such laws to exercise corporate trust or stock
         transfer powers and is subject to supervision or examination by federal
         or state authority and which has individually or combined with an
         affiliate at the time of its appointment as Rights Agent a combined
         capital and surplus of at least $100 million dollars. After
         appointment, the successor Rights Agent shall be vested with the same
         powers, rights, duties and responsibilities as if it had been
         originally named as Rights Agent without further act or deed; but the
         predecessor Rights Agent shall deliver and transfer to the successor
         Rights Agent any property at the time held by it hereunder, and execute
         and deliver any further assurance, conveyance, act or deed necessary
         for the purpose. Not later than the effective date of any such
         appointment the Company shall file notice thereof in writing with the
         predecessor Rights Agent and each transfer agent of the Preferred Stock
         and the Company Common Stock, and mail a notice thereof in writing to
         the registered holders of the Rights Certificates. Failure to give any
         notice provided for in this Section 21, however, or any defect therein,
         shall not affect the legality or validity of the resignation or removal
         of the Rights Agent or the appointment of the successor Rights Agent,
         as the case may be."

         4.       Section 25 is hereby amended to delete the reference "State
         Street Bank & Trust Company" and in its place, to add "EquiServe Trust
         Company, N.A."

         5.       EquiServe hereby warrants that it satisfies all of the
         requirements to serve as Rights Agent and hereby is a successor Rights
         Agent and agrees to be bound by the terms of the Agreement, as amended
         by this Amendment.

         6.       Except as amended hereby, the Agreement and all schedules or
         exhibits thereto shall remain in full force and effect.

                            [Signature page follows]
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         IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
executed in their names and on their behalf by and through their duly authorized
officers, effective as of December 13, 2001.

                                    DETREX CORPORATION

                                    By: /s/ Robert M. Currie
                                       ------------------------
                                       Name:  Robert M. Currie
                                       Its: Secretary

                                    STATE STREET BANK &
                                    TRUST COMPANY

                                    By:/s/ Charles V. Rossi
                                       ------------------------
                                       Name: Charles V. Rossi
                                       Its: Vice President

                                    EQUISERVE TRUST
                                    COMPANY, N.A.

                                    By:/s/ Carol Mulvey-Eori
                                       ------------------------
                                       Name: Carol Mulvey-Eori
                                       Its: Managing Director

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