EXHIBIT 10.35
                                             (Translated from German to English)
"VT_PRODAC.Ii"


                               LEASE CONTRACT


                               by and between

                             Kasbach + Wirt GbR
                             Max-Planck-Str. 38
                                50858 Cologne

                                 - Lessor -


                                     and


                                 PRODAC GmbH
                             Max-Planck-Str. 38
                                50858 Cologne

                                 - Lessee -



The parties entered into a lease contract dated December 15, 1993.  In the
following, (S) 3 of said lease contract is rendered more precise and redrafted
hereby.  The provision shall take effect starting January 1, 1994.  This
modification agreement shall become an integrated component of the contract
dated December 15, 1993.

The contract dated 12/15/93 shall otherwise remain in effect without
modification.

 
                                      2


             (S) 3 RENT, ANCILLARY CHARGES AND SECURITY DEPOSIT

1.   The monthly rent shall be



                                               
1,928 m/2/ office space         DM 23.00 per m/2/   DM 44,344.00
248 m/2/   office space         DM 26.00 per m/2/   DM  6,448.00
1,168 m/2/ workshop space       DM 17.00 per m/2/   DM 19,856.00
466 m/2/   hall space           DM 11.00 per m/2/   DM  5,126.00
                                                    ------------
                        Subtotal:                   DM 75,774.00
 50 parking spaces              DM 65.00 per m/2/   DM  3,250.00
                                                    ------------
                        Total:;                     DM 79,024.00
                                                    ============


     The statutory value-added tax (currently 15%) and the heating and ancillary
     cost advance shall be added thereto.

2.   If the cost of living index determined by the Federal Office of Statistics
     (4-person middle-income working household with a head of household who is
     the sole provider, basis 1985 = 100) increases or decreases by more than 10
     points, the rent shall change in accordance with the change which has
     occurred in the standard of living index.

     The basis for the calculation shall be the index on [crossed out by hand:]
     December 15, 1993.
     [handwritten interlinear insertion:  1/1/94  W]

 
                                      3


     The change in rent shall take effect without any action by the parties at
     the beginning of the following month for which the change of the cost of
     living index is determined by the Federal Office of Statistics.  A new rent
     change shall take place if, following a rent adjustment, the index once
     again changes by 10 points.

     The rent change may be asserted retroactively.

     The contracting parties are in agreement that this value security clause
     shall require the approval of the competent Central State Bank.  If such
     approval is denied, this provision shall be replaced by an agreement which
     comes as close as possible to the economic intent of the lapsed provision.


3.   The Lessee may set counterclaims off against the rent claim or assert a
     right to reduce or retain rent only if the counterclaim or the right to
     reduce or retain rent has been acknowledged or established by final
     judicial determination.  An offset or the assertion of a right to reduce or
     retain rent shall be announced to the Lessor in writing upon one month's
     notice.


4.   All payments by the Lessee shall be charged to outstanding rents in the
     following sequence:

     -  outstanding ancillary charges
     -  current rent
     -  current ancillary costs
     -  interest
     -  costs, particularly legal prosecution costs.

 
                                      4


5.   The ancillary costs for the property shall correspond to the 2nd
     Calculation Regulations and shall be paid separately in addition to rent in
     accordance with the administrative invoice which shall be prepared
     annually.

6.   Among other things, said ancillary costs shall relate to a pro rata share
     of the following:

     -  custodian, if any
     -  multiple protection building insurance
     -  glass breakage insurance with DM 1,000.00 deductible
     -  liability insurance
     -  municipal fees and charges, including local property tax
     -  water
     -  waste water disposal
     -  garbage pick-up
     -  chimney and street cleaning
     -  operation, maintenance and service of elevators and other facilities
        used by the Lessee
     -  community antenna facility
     -  building cleaning

     In addition, the Lessee shall bear a pro rata portion of the costs of
     building management.  Pursuant to the heating cost regulations, ancillary
     costs shall also include the cost for the operation and service of the
     heating equipment, as well as the annual heating costs allocation and
     invoicing by a specialized firm.

 
                                      5


     The ancillary costs shall be allocated to the Lessee according to the size
     of its heatable leased space in relation to overall leased space.  The
     allocation shall be carried out by means of a heating quantity meter.

6.   [crossed out by hand] Billing for ancillary costs shall be made at the end
     of each calendar year.  [handwritten interlinear insertion:] The billing
     period for ancillary costs shall correspond to the calendar year.  W

     In the event that the heating costs invoice is issued separately through a
     specialized firm, the time of billing may change.

     THE LESSEE SHALL MAKE A MONTHLY ANCILLARY AND HEATING COST PREPAYMENT OF DM
     3.50 PER M/2/ OF LEASED SPACE, PLUS VALUE-ADDED TAX AT THE STATUTORY RATE,
     TOGETHER WITH ITS RENT PAYMENT.  This sum may be raised or lowered by the
     Lessor in a reasonable manner at any time depending on the amount of actual
     costs.

7.   Rent, along with the aforementioned ancillary and heating costs
     prepayments, shall be transferred to the account of the Lessor on a monthly
     basis in advance, but no later than the 5th working day of each month.

                 ACCOUNT NO. 4362463 AT STADTSPARKASSE KOLN
                          BANK WIRE NO. 370 501 98

     All increased charges which arise in connection with the aforementioned
     ancillary costs after the conclusion of the contract may be allocated by
     the Lessor on a pro rata basis.  Fire insurance premium surcharges to the
     basic premium shall be borne by the lessee for whose company they were
     required.

 
                                      6


Cologne, October  7 , 1996
                 ---      



Kasbach + Wirt GbR                  PRODAC GmbH
Max Planck Str. 38                  Max Planck Str. 38
50858 Cologne                       50858 Cologne
R. Kasbach/H. Wirt                  R. Kasbach/H. Wirt
/s/ R. Kasbach                      /s/ R. Kasbach
/s/ H. Wirt                         /s/ H. Wirt

- - Signature of Lessor -             - Signature of Lessee -