Patents Reinstated Due to the Acceptance of a
                       Late Maintenance Fee From 8/10/01

Patent          Serial          Filing          Issue           Granted
Number          Number          Date            Date            Date

4,649,370       06/621,165      06/15/84        03/10/87        08/14/01
4,760,348       07/033,278      04/02/87        07/26/88        08/15/01
4,785,480       07/034,401      04/03/87        11/22/88        08/10/01
4,822,736       06/627,957      07/05/84        04/18/89        08/15/01
4,830,148       07/077,570      07/24/87        05/16/89        08/13/01
4,830,438       07/233,083      08/17/88        05/16/89        08/15/01
4,851,389       07/075,793      07/20/87        07/25/89        08/16/01
5,032,480       07/290,536      12/27/88        07/16/91        08/10/01
5,054,820       07/434,211      11/13/89        10/08/91        08/15/01
5,178,405       07/614,920      11/15/90        01/12/93        08/14/01
5,180,752       07/490,332      03/08/90        01/19/93        08/15/01
5,193,281       07/845,278      03/03/92        03/16/93        08/13/01
5,225,180       07/757,470      09/10/91        07/06/93        08/16/01
5,427,417       08/245,560      05/18/94        06/27/95        08/14/01
5,435,357       08/301,060      09/06/94        07/25/95        08/15/01
5,437,608       07/963,285      10/19/92        08/01/95        08/16/01
5,458,021       08/160,139      12/02/93        10/17/95        08/15/01
5,481,876       08/318,306      10/05/94        01/09/96        08/15/01
5,495,033       08/297,636      08/29/94        02/27/96        08/14/01
5,542,505       08/452,062      05/26/95        08/06/96        08/15/01
5,563,986       08/044,393      04/08/93        10/08/96        08/10/01
5,568,563       08/237,138      05/03/94        10/22/96        08/14/01
5,580,656       08/365,549      12/28/94        12/03/96        08/15/01