Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 12/22/00

Patent          Serial           Filing         Issue          Granted
Number          Number           Date           Date           Date

4,754,797       07/002,829       01/13/87       07/05/88       12/22/00
4,792,241       07/100,648       09/24/87       12/20/88       12/26/00
5,018,928       07/429,589       10/31/89       05/28/91       12/26/00
5,122,884       07/612,686       11/14/90       06/16/92       12/26/00
5,138,268       07/568,367       08/15/90       08/11/92       12/22/00
5,148,835       07/827,402       01/29/92       09/22/92       12/22/00
5,163,606       07/301,332       01/25/89       11/17/92       12/22/00
5,206,452       07/820,035       01/14/92       04/27/93       12/22/00
5,207,348       07/897,945       06/15/92       05/04/93       12/26/00
5,292,773       07/845,157       03/02/92       03/08/94       12/28/00
5,370,651       07/833,362       02/10/92       12/06/94       12/26/00
5,373,449       07/683,720       04/11/91       12/13/94       12/26/00
5,480,430       08/320,121       10/07/94       01/02/96       12/26/00
5,488,922       08/231,470       04/22/94       02/06/96       12/26/00
5,515,863       08/178,741       01/07/94       05/14/96       12/27/00
5,531,352       08/089,686       07/09/93       07/02/96       12/22/00
5,572,738       08/484,543       06/07/95       11/12/96       12/26/00
5,576,622       07/791,338       11/14/91       11/19/96       12/27/00