Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 10/09/98

Patent           Serial Number     Filing          Issue          Granted
Number           Number            Date            Date           Date

4,539,341        06/582,348        02/22/84        09/03/85       10/15/98
4,724,468        06/912,925        09/29/86        02/09/88       10/09/98
4,877,417        07/164,066        03/03/88        10/31/89       10/09/98
4,897,958        07/261,722        10/24/88        02/06/90       10/09/98
5,203,477        07/721,343        07/01/91        04/20/93       10/14/98
5,318,899        07/483,229        02/20/90        06/07/94       10/13/98
5,326,085        08/024,513        03/01/93        07/05/94       10/13/98