Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 07/03/98
   
Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,806,099        07/115,198        11/02/87        02/21/89       07/06/98
5,240,668        07/566,034        08/13/90        08/31/93       07/06/98
5,277,111        07/878,435        05/04/92        01/11/94       07/06/98
5,279,828        08/021,564        02/24/93        01/18/94       07/06/98
5,280,398        08/008,214        01/25/93        01/18/94       07/06/98