Patent Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 08/20/99

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,490,131        06/383,710        06/01/82        12/25/84       08/20/99
4,520,811        06/584,326        02/28/84        06/04/85       08/26/99
4,539,640        06/407,275        08/10/82        09/03/85       08/26/99
4,637,403        06/744,539        06/14/85        01/20/87       08/24/99
4,845,484        07/107,355        10/09/87        07/04/89       08/20/99
4,849,427        07/159,841        02/24/88        07/18/89       08/24/99
4,858,584        07/249,675        09/27/88        08/22/89       08/24/99
4,861,022        07/228,481        08/05/88        08/29/89       08/23/99
4,879,760        07/060,741        06/10/87        11/07/89       08/23/99
4,880,622        06/865,504        05/20/86        11/14/89       08/24/99
4,928,101        07/394,393        08/15/89        05/22/90       08/23/99
4,979,269        07/388,946        08/03/89        12/25/90       08/24/99
4,987,425        07/271,037        11/14/88        01/22/91       08/24/99
5,000,812        07/386,214        07/28/89        03/19/91       08/24/99
5,004,270        07/395,501        08/17/89        04/02/91       08/24/99
5,004,553        07/421,751        10/16/89        04/02/91       08/23/99
5,230,527        07/872,109        04/22/92        07/27/93       08/24/99
5,277,136        07/763,135        09/20/91        01/11/94       08/20/99
5,301,637        07/956,269        10/05/92        04/12/94       08/25/99
5,307,587        08/052,646        04/26/93        05/03/94       08/23/99
5,314,308        07/989,583        12/11/92        05/24/94       08/23/99
5,330,337        07/967,345        10/27/92        07/19/94       08/26/99
5,337,576        07/997,316        12/28/92        08/16/94       08/23/99
5,337,652        07/915,438        07/17/92        08/16/94       08/26/99
5,339,508        07/968,956        10/30/92        08/23/94       08/26/99
5,339,555        08/092,989        07/19/93        08/23/94       08/23/99
5,345,902        07/962,263        10/16/92        09/13/94       08/23/99
5,353,092        08/137,458        10/15/93        10/04/94       08/24/99
5,354,285        08/113,354        08/30/93        10/11/94       08/23/99
5,363,858        08/057,607        05/05/93        11/15/94       08/26/99
5,367,682        07/692,619        04/29/91        11/22/94       08/25/99
5,385,672        08/135,223        10/13/93        01/31/95       08/23/99
5,387,919        08/068,728        05/26/93        02/07/95       08/21/99
5,390,202        07/995,852        12/23/92        02/14/95       08/25/99
5,408,865        08/106,555        08/16/93        04/25/95       08/26/99
5,421,867        08/136,821        10/18/93        06/06/95       08/23/99