Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 06/19/98
   
Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date 

4,523,819        06/497,645        05/24/83        06/18/85       06/23/98
4,766,178        07/048,854        05/12/87        08/23/88       06/23/98
4,841,878        07/087,996        08/17/87        06/27/89       06/19/98
4,850,133        07/291,507        12/29/88        07/25/89       06/25/98
4,870,585        07/107,168        10/13/87        09/26/89       06/25/98
4,878,779        07/306,089        02/03/89        11/07/89       06/19/98
5,103,758        07/687,165        04/18/91        04/14/92       06/25/98
5,171,330        07/711,763        06/07/91        12/15/92       06/23/98
5,173,553        07/550,308        07/09/90        12/22/92       06/19/98
5,197,762        07/740,502        08/05/91        03/30/93       06/19/98
5,236,352        07/958,967        10/08/92        08/17/93       06/25/98
5,265,807        07/890,849        06/01/92        11/30/93       06/19/98
5,280,932        08/085,454        06/30/93        01/25/94       06/19/98
5,282,660        07/968,348        10/29/92        02/01/94       06/25/98
5,285,986        07/869,645        04/16/92        02/15/94       06/23/98