Patents Reinstated Due to the Acceptance of a 
                      Late Maintenance Fee From 07/10/98
   
Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

RE 34,912        08/124,802        09/21/93        04/18/95       07/13/98
4,718,699        06/466,280        02/14/83        01/12/88       07/13/98
4,872,595        07/249,956        09/27/88        10/10/89       07/14/98
5,249,362        07/886,729        05/21/92        10/05/93       07/14/98
5,258,403        07/895,526        06/02/92        11/02/93       07/10/98
5,277,119        07/940,046        09/03/92        01/11/94       07/14/98
5,299,227        08/045,186        04/13/93        03/29/94       07/10/98