Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 09/22/00

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

RE. 34,637       07/949,309        09/22/92        06/14/94       09/25/00
RE. 35,327       08/208,341        03/09/94        09/10/96       09/25/00
4,610,356        06/656,014        09/27/84        09/09/86       09/27/00
4,710,681        06/829,972        02/18/86        12/01/87       09/25/00
4,748,600        07/080,344        07/31/87        05/31/88       09/25/00
4,764,560        07/083,885        08/10/87        08/16/88       09/27/00
4,956,882        07/382,776        07/19/89        09/18/90       09/27/00
5,000,793        07/245,402        07/21/88        03/19/91       09/22/00
5,003,603        06/642,299        08/20/84        03/26/91       09/25/00
5,049,259        07/301,695        01/25/89        09/17/91       09/22/00
5,056,602        07/452,485        12/19/89        10/15/91       09/28/00
5,074,309        07/444,920        12/04/89        12/24/91       09/22/00
5,079,918        07/479,277        02/12/90        01/14/92       09/28/00
5,145,688        07/592,143        10/03/90        09/08/92       09/27/00
5,184,854        07/829,255        02/03/92        02/09/93       09/22/00
5,233,141        07/727,757        07/09/91        08/03/93       09/25/00
5,299,883        07/888,156        05/26/92        04/05/94       09/22/00
5,370,431        08/225,954        04/08/94        12/06/94       09/28/00
5,403,093        08/152,432        11/12/93        04/04/95       09/27/00
5,433,854        08/213,597        03/16/94        07/18/95       09/25/00
5,434,232        08/312,246        09/26/94        07/18/95       09/26/00
5,437,457        08/131,489        10/04/93        08/01/95       09/22/00
5,465,645        08/325,614        10/19/94        11/14/95       09/25/00
5,493,292        08/311,677        09/23/94        02/20/96       09/27/00
5,503,228        08/349,253        12/05/94        04/02/96       09/28/00
5,530,853        08/400,784        03/06/95        06/25/96       09/28/00
5,531,880        08/304,918        09/13/94        07/02/96       09/28/00
5,534,349        08/449,195        05/24/95        07/09/96       09/26/00
5,536,353        08/373,848        01/18/95        07/16/96       09/28/00
5,541,087        08/305,700        09/14/94        07/30/96       09/27/00
5,547,098        08/348,260        11/28/94        08/20/96       09/28/00
5,552,619        08,436,181        05/10/95        09/03/96       09/28/00
5,560,790        08/335,864        11/10/94        10/01/96       09/26/00