Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 12/13/96

Patent Number    Serial Number     Filing Date   Issue Date    Granted Date

4,428,654        06/255,694        04/20/81        01/31/84     12/16/96
4,439,613        06/365,213        04/05/82        03/27/84     12/13/96
4,447,464        06/451,075        12/20/82        05/08/84     12/16/96
4,471,200        06/438,715        11/03/82        09/11/84     12/17/96
4,475,851        06/449,066        12/13/82        10/09/84     12/16/96
4,513,451        06/468,584        02/22/83        04/30/85     12/17/96
4,623,038        06/741,528        06/04/85        11/18/86     12/17/96
4,684,526        06/685,155        12/21/84        08/04/87     12/19/96
4,689,707        06/867,161        05/27/86        08/25/87     12/18/96
4,712,919        07/000,670        01/06/87        12/15/87     12/17/96
4,772,262        07/045,708        04/27/87        09/20/88     12/16/96
4,789,433        07/007,909        10/31/86        12/06/88     12/18/96
4,881,661        07/177,424        04/01/88        11/21/89     12/13/96
4,951,439        07/294,747        01/09/89        08/28/90     12/13/96
4,974,486        07/245,562        09/19/88        12/04/90     12/18/96
4,998,928        07/509,269        04/13/90        03/12/91     12/16/96
5,107,794        07/756,560        09/09/91        04/28/92     12/17/96

                 Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 12/20/96

Patent Number    Serial Number     Filing Date   Issue Date    Granted Date

5,141,109        07/759,509        09/13/91        08/25/92        12/27/96