Patent Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 10/08/99

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

5,305,752        07/891,851        06/01/92        04/26/94       10/08/99
5,316,835        07/977,043        11/16/92        05/31/94       10/08/99
5,346,495        08/202,731        02/28/94        09/13/94       10/14/99
5,394,774        08/067,598        05/27/93        03/07/95       10/08/99
5,403,121        07/797,670        11/25/91        04/04/95       10/08/99