Release of Security Agreement - InVision Technologies Inc. and Silicon Valley Bank


                      RELEASE OF SECURITY AGREEMENT COVERING 
                      INTERESTS IN INVISION TECHNOLOGIES, INC.
                                          
        
     Silicon Valley Bank ('Secured Party'), hereby releases its security 
interest in the interests of InVision Technologies, Inc. in the trademarked 
works set forth on Schedule A attached hereto, created by that certain 
Intellectual Property Security Agreement executed by InVision Technologies, 
Inc. in favor of Secured Party recorded with the United States Patent and 
Trademark Office on March 4, 1997, in Reel/Frame 1560/0460.
                                          
Dated:  April 15, 1998                  SILICON VALLEY BANK


                                        By:  _______________________
                                        Name: ______________________
                                        Title: _____________________
                                          
                                          
                                   ACKNOWLEDGMENT

STATE OF CALIFORNIA      )
                         )ss.
COUNTY OF SANTA CLARA    )

     On ____________________ before me, ________________________, personally
appeared ______________________, personally known to me to be the person whose
name is subscribed to the within instrument and acknowledged to me that he/she
executed the same in his/her authorized capacity, and that by his/her signature
on the instrument the person, or the entity on behalf of which the person acted,
executed the instrument.

WITNESS my hand and official seal.


_________________________________
Notary Public in and for said County and
State


My Commission Expires ____________________________






                                      EXHIBIT 'A'

                                      TRADEMARKS


Description                        Registration Number      Registration Date

Invision                           2,030,463                01/14/97


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                      RELEASE OF SECURITY AGREEMENT COVERING 
                      INTERESTS IN INVISION TECHNOLOGIES, INC.


     Silicon Valley Bank ('Secured Party'), hereby releases its security 
interest in the interests of InVision Technologies, Inc. in the patented 
works set forth on Schedule A attached hereto, created by that certain 
Intellectual Property Security Agreement executed by InVision Technologies, 
Inc. in favor of Secured Party recorded with the United States Patent and 
Trademark Office on March 4, 1997, in Reel/Frame 8376/0896.
                                          
Dated:  April 15, 1998                  SILICON VALLEY BANK


                                        By:  ________________________
                                        Name: ______________________
                                        Title: _______________________
                                          
                                          
                                   ACKNOWLEDGMENT

STATE OF CALIFORNIA      )
                         )ss.
COUNTY OF SANTA CLARA    )

     On ____________________ before me, ________________________, personally 
appeared ______________________, personally known to me to be the person 
whose name is subscribed to the within instrument and acknowledged to me that 
he/she executed the same in his/her authorized capacity, and that by his/her 
signature on the instrument the person, or the entity on behalf of which the 
person acted, executed the instrument.

WITNESS my hand and official seal.


_________________________________
Notary Public in and for said County and
State


My Commission Expires ____________________________






                                     EXHIBIT 'A'

                                       PATENTS

Description                                  Registration #   Registration Date

Automatic concealed object detection system  5,367,552        11/22/94
having a pre-scan stage

Automatic concealed object detection system  5,182,764        01/26/93
having a pre-scan stage

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