Patent Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 01/01/99

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,595,178        06/687,634        12/31/84        06/17/86       01/07/99
5,141,212        07/681,982        04/08/91        08/25/92       01/06/99
5,192,105        07/826,852        01/28/92        03/09/93       01/05/99
5,201,126        07/741,042        08/06/91        04/13/93       01/05/99
5,265,298        07/840,826        02/25/92        11/30/93       01/05/99
5,291,972        07/562,558        07/26/90        03/08/94       01/05/99
5,312,109        07/719,022        06/21/91        05/17/94       01/05/99
5,315,586        07/905,794        06/29/92        05/24/94       01/05/99