Patents Reinstated Due to the Acceptance of a
                     Late Maintenance Fee From 1/26/01

Patent          Serial           Filing         Issue          Granted
Number          Number           Date           Date           Date

4,778,006       07/046,587       05/04/87       10/18/88       01/26/01
4,844,172       07/084,015       08/11/87       07/04/89       01/30/01
4,983,181       07/402,986       09/01/89       01/08/91       01/26/01
5,037,101       07/540,081       06/19/90       08/06/91       02/01/01
5,078,219       07/553,467       07/16/90       01/07/92       01/30/01
5,091,836       07/709,358       06/03/91       02/25/92       01/30/01
5,127,626       07/590,181       10/02/90       07/07/92       02/01/01
5,131,384       07/704,869       05/23/91       07/21/92       01/30/01
5,137,260       07/365,518       06/13/89       08/11/92       02/01/01
5,138,468       07/473,890       02/02/90       08/11/92       01/26/01
5,142,947       07/737,644       07/30/91       09/01/92       01/26/01
5,148,458       07/702,123       05/16/91       09/15/92       01/26/01
5,158,043       07/622,060       12/04/90       10/27/92       01/30/01
5,403,985       08/007,846       01/22/93       04/04/95       01/29/01
5,466,900       08/205,650       03/04/94       11/14/95       02/01/01
5,518,150       08/374,350       01/18/95       05/21/96       01/30/01
5,518,491       08/339,885       11/14/94       05/21/96       01/26/01
5,563,780       08/164,097       12/08/93       10/08/96       01/30/01
5,569,834       08/388,642       02/14/95       10/29/96       02/01/01
5,577,429       08/265,359       06/24/94       11/26/96       02/01/01
5,586,121       08/426,920       04/21/95       12/17/96       01/29/01