Patent Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 12/04/98

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,785,470        06/856,685        04/25/86        11/15/88       03/25/99
5,347,425        07/961,236        10/15/92        09/13/94       03/25/99