Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 05/29/98
   
Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,491,725        06/426,982        09/29/82        01/01/85       06/02/98
4,545,576        06/523,374        08/13/83        10/08/85       05/29/98
4,553,127        06/509,333        06/30/83        11/12/85       05/29/98
4,765,386        06/937,778        12/04/86        08/23/88       06/02/98
4,776,551        07/082,342        08/06/87        10/11/88       06/02/98
4,805,308        07/025,949        03/16/87        02/21/89       06/02/98
4,812,498        06/945,733        12/22/86        03/14/89       06/03/98
4,822,733        06/738,560        05/28/85        04/18/89       05/29/98
4,854,706        07/077,931        07/27/87        08/80/89       06/04/98
4,998,848        07/329,183        03/27/89        03/12/91       05/29/98
5,150,158        07/605,086        10/29/90        09/22/92       05/29/98
5,152,303        07/717,147        06/18/91        10/06/92       06/02/98
5,171,393        07/737,455        07/29/91        12/15/92       06/02/98
5,200,795        07/401,175        08/31/89        04/06/93       05/29/98
5,228,688        07/615,352        11/19/90        07/20/93       06/02/98
5,236,371        07/965,858        10/23/92        08/17/93       06/03/98
5,277,477        07/726,583        07/08/91        01/11/94       06/02/98
5,293,511        08/033,687        03/16/93        03/08/94       06/02/98