Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 06/26/98
   
Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,734,674        06/720,709        04/08/85        03/29/88       07/02/98
4,739,930        06/885,774        07/15/86        04/26/88       07/02/98
4,824,132        07/145,105        01/19/88        04/25/89       06/30/98
4,832,437        07/048,142        05/11/87        05/23/89       06/29/98
4,832,461        07/086,803        08/19/87        05/23/89       06/29/98
4,853,161        07/219,879        07/11/88        08/01/89       06/30/98
4,894,529        07/267,205        11/03/88        01/16/90       07/02/98
4,921,715        07/292,832        01/03/89        05/01/90       07/01/98
5,068,765        07/476,338        02/06/90        11/26/91       06/30/98
5,103,658        07/646,821        01/28/91        04/14/92       06/29/98
5,154,441        07/826,795        01/28/92        10/13/92       06/30/98
5,217,688        07/824,560        01/23/92        06/08/93       07/01/98
5,231,668        07/736,451        07/26/91        07/27/93       06/29/98
5,283,949        07/971,079        11/03/92        02/08/94       07/02/98
5,291,863        07/979,101        11/20/92        03/08/94       06/26/98
5,292,873        07/442,947        11/29/89        03/08/94       06/30/98
5,303,563        07/911,186        07/09/92        04/19/94       07/02/98