Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 10/03/97

Patent           Serial Number     Filing          Issue          Granted
Number           Number            Date            Date           Date

4,518,703        06/447,477        12/06/82        05/21/85       10/03/97
4,626,346        06/827,867        02/10/86        12/02/86       10/06/97
4,798,590        06/554,617        11/22/83        01/17/89       10/07/97


                 Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 10/10/97

Patent           Serial Number     Filing          Issue          Granted
Number           Number            Date            Date           Date

5,204,473        07/883,812        05/12/92        04/20/93       10/15/97
5,225,464        07/861,530        04/02/92        07/06/93       10/10/97