Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 06/05/98
   
Patent           Serial            Filing          Issue           Granted
Number           Number            Date            Date            Date

Re. 34,800       06/938,409        12/05/86        11/29/94        06/10/98
4,502,623        06/405,073        08/04/82        03/05/85        06/11/98
4,526,129        06/313,785        10/22/81        07/02/85        06/11/98
4,873,870        07/145,373        01/19/88        10/17/89        06/08/98
5,063,090        07/548,233        06/29/90        11/05/91        06/11/98
5,239,625        07/664,763        03/05/91        08/24/93        06/08/98
5,258,158        07/805,019        12/11/91        11/02/93        06/08/98