Patents Reinstated Due to the Acceptance of a
                       Late Maintenance Fee From 7/20/01

Patent          Serial          Filing          Issue           Granted
Number          Number          Date            Date            Date

4,892,543       07/305,603      02/02/89        01/09/90        07/20/01
5,033,264       07/367,383      06/16/89        07/23/91        07/23/01
5,083,296       07/568,166      08/16/90        01/21/92        07/23/01
5,086,292       07/429,458      10/31/89        02/04/92        07/20/01
5,139,737       07/622,567      12/05/90        08/18/92        07/23/01
5,178,016       07/710,253      06/03/91        01/12/93        07/23/01
5,210,814       07/861,258      03/31/92        05/11/93        07/20/01
5,211,109       07/767,119      09/27/91        05/18/93        07/23/01
5,432,595       08/090,271      07/13/93        07/11/95        07/23/01
5,555,283       08/488,404      06/07/95        09/10/96        07/23/01
5,587,231       08/282,371      07/29/94        12/24/96        07/20/01
5,599,441       08/455,747      05/31/95        02/04/97        07/23/01
5,612,458       08/361,643      12/22/94        03/18/97        07/23/01
5,620,331       08/356,685      12/15/94        04/15/97        07/23/01
5,629,937       08/408,997      03/23/95        05/13/97        07/23/01