Patents Reinstated Due to the  Acceptance of a
                      Late Maintenance Fee From 12/27/96

Patent         Serial            Filing         Issue        Granted
Number         Number            Date           Date         Date

4,453,004      06/364,325        04/01/82       06/05/84     12/30/96
4,468,982      06/311,017        10/13/81       09/04/84     12/30/96
4,534,343      06/574,340        01/27/84       08/13/85     12/30/96
4,561,097      06/658,571        10/09/84       12/24/85     12/31/96
4,620,599      06/554,354        11/22/83       11/04/86     12/31/96
4,636,219      06/804,927        12/05/85       01/13/87     12/30/96
4,667,469      06/805,691        12/06/85       05/26/87     12/31/96
4,722,785      06/854,429        04/21/86       02/02/88     12/30/96
4,739,289      06/933,820        11/24/86       04/19/88     12/30/96
4,768,002      07/017,718        02/24/87       08/30/88     12/30/96
4,797,203      06/932,251        11/19/86       01/10/89     12/31/96
4,953,967      07/359,706        05/31/89       09/04/90     12/30/96
5,007,401      07/102,711        09/30/87       04/16/91     12/31/96
5,032,505      07/274,069        11/21/88       07/16/91     12/31/96
5,066,711      07/437,471        11/15/89       11/19/91     12/31/96
5,068,561      07/466,650        01/17/90       11/26/91     12/30/96
5,098,198      07/758,374        09/03/91       03/24/92     12/31/96
5,102,529      07/656,598        02/19/91       04/07/92     12/31/96
5,104,384      07/640,310        01/25/91       04/14/92     12/31/96
5,138,036      07/435,622        11/13/89       08/11/92     12/30/96
5,141,109      07/759,509        09/13/91       08/25/92     12/27/96
5,143,921      07/533,395        06/04/90       09/01/92     12/31/96
5,146,662      07/814,504        12/30/91       09/15/92     12/31/96


                 Patents Reinstated Due to the Acceptance of a
                       Late Maintenance Fee From 1/10/97

Patent         Serial            Filing         Issue        Granted
Number         Number            Date           Date         Date

4,668,366      06/790,673        10/23/85       05/26/87     01/13/97
5,078,958      07/504,612        04/04/90       01/07/92     01/16/97
5,080,153      07/644,112        01/18/91       01/14/92     01/16/97
5,098,573      07/730,014        07/12/91       03/24/92     01/16/97
5,134,689      07/235,588        08/24/88       07/28/92     01/15/97
5,155,321      07/611,309        11/09/90       10/13/92     01/16/97
5,161,311      07/883,816        05/13/92       11/10/92     01/16/97