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

5,295,877        07/982,843        11/30/92        03/22/94       02/05/99
5,311,125        07/853,400        03/18/92        05/10/94       02/09/99
5,321,614        07/711,196        06/06/91        06/14/94       02/05/99
5,323,141        07/962,527        10/16/92        06/21/94       02/05/99
5,378,143        07/965,152        10/20/92        01/03/95       02/11/99