Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 10/16/98

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,892,025        07/223,095        07/22/88        01/09/90       10/22/98
5,150,482        07/735,856        07/25/91        09/29/92       10/21/98
5,192,010        07/723,748        07/01/91        03/09/93       10/16/98
5,328,995        08/009,427        01/27/93        07/12/94       10/22/98