Patents Reinstated Due to the Acceptance of a
                       Late Maintenance Fee From 2/09/01

Patent          Serial          Filing          Issue           Granted
Number          Number          Date            Date            Date

4,688,280       06/921,140      10/20/86        08/25/87        02/13/01
4,793,231       07/021,403      03/04/87        12/27/88        02/14/01
4,880,186       07/109,726      12/24/86        11/14/89        02/09/01
4,991,538       07/408,458      09/15/89        02/12/91        02/09/01
5,053,041       07/491,727      03/12/90        10/01/91        02/12/01
5,090,817       07/638,738      01/08/91        02/25/92        02/09/01
5,104,068       07/565,963      08/10/90        04/14/92        02/12/01
5,134,644       07/569,894      08/17/90        07/28/92        02/09/01
5,156,943       07/520,629      05/08/90        10/20/92        02/09/01
5,173,071       07/764,521      09/24/91        12/22/92        02/09/01
5,381,782       08/021,955      02/23/93        01/17/95        02/09/01
5,387,230       08/142,246      10/22/93        02/07/95        02/13/01
5,413,329       08/206,372      03/07/94        05/09/95        02/14/01
5,485,883       08/423,024      04/17/95        01/23/96        02/13/01
5,499,200       08/062,804      05/17/93        03/12/96        02/12/01
5,527,553       08/475,600      06/07/95        06/18/96        02/12/01
5,550,103       08/108,929      08/18/93        08/27/96        02/12/01
5,553,099       08/194,708      02/10/94        09/03/96        02/13/01
5,554,301       08/436,623      05/08/95        09/10/96        02/13/01
5,558,790       08/196,491      02/15/94        09/24/96        02/09/01
5,562,966       07/492,967      03/12/90        10/08/96        02/09/01
5,579,274       08/483,038      06/06/95        11/26/96        02/12/01