Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 03/06/98
   
Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,508,267        06/482,349        04/05/83        04/02/85       03/09/98
4,736,950        06/810,779        12/19/85        04/12/88       03/11/98
4,825,542        07/009,389        01/30/87        05/02/89       03/09/98
5,062,185        07/619,598        11/29/90        11/05/91       03/06/98
5,084,044        07/380,200        07/14/89        01/28/92       03/12/98
5,094,182        07/673,745        03/21/91        03/10/92       03/11/98
5,124,058        07/626,137        12/12/90        06/23/92       03/11/98
5,206,900        07/708,722        05/31/91        04/27/93       03/12/98
5,227,160        07/219,401        07/15/88        07/13/93       03/11/98
5,228,229        07/761,342        09/06/91        07/20/93       03/06/98
5,240,086        07/880,684        05/08/92        08/31/93       03/09/98
5,253,377        07/849,515        03/11/92        10/19/93       03/12/98
5,272,838        07/823,353        01/21/92        12/28/93       03/09/98