Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 12/15/00

Patent          Serial           Filing         Issue          Granted
Number          Number           Date           Date           Date

4,712,575       07/020,566       03/02/87       12/15/87       12/19/00
4,753,730       06/816,408       01/06/86       06/28/88       12/20/00
4,821,835       07/221/262       07/19/88       04/18/89       12/19/00
4,976,739       07/338,543       04/14/89       12/11/90       12/21/00
5,037,766       07/466,583       01/17/90       08/06/91       12/18/00
5,092,348       07/500,221       03/28/90       03/03/92       12/20/00
5,132,089       07/648,892       01/31/91       07/21/92       12/21/00
5,132,983       07/676,514       03/28/91       07/21/92       12/19/00
5,185,921       07/787,249       11/04/91       02/16/93       12/18/00
5,393,325       08/148,999       11/08/93       02/28/95       12/20/00
5,402,902       08/154,491       11/19/93       04/04/95       12/19/00
5,409,241       08/091,593       07/14/93       04/25/95       12/21/00
5,461,932       08/188,050       01/26/94       10/31/95       12/20/00
5,498,278       08/359,917       12/19/94       03/12/96       12/20/00
5,501,365       08/218,314       03/25/94       03/26/96       12/18/00
5,505,867       08/271,121       07/06/94       04/09/96       12/19/00
5,554,103       08/396,261       02/27/95       09/10/96       12/20/00
5,554,136       08/395,493       02/27/95       09/10/96       12/19/00
5,561,124       08/436,292       05/17/95       10/01/96       12/21/00
5,565,751       08/314,048       09/28/94       10/15/96       12/21/00