Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 08/24/01

Patent          Serial          Filing          Issue           Granted
Number          Number          Date            Date            Date

4,753,818       06/889,562      07/25/86        06/28/88        08/30/01
4,780,040       07/131,756      12/11/87        10/25/88        08/24/01
4,809,375       06/855,138      04/23/86        03/07/89        08/29/01
4,830,168       07/188,447      04/29/88        05/16/89        08/27/01
5,037,691       07/398,128      08/23/89        08/06/91        08/29/01
5,142,900       07/599,057      10/17/90        09/01/92        08/30/01
5,185,549       07/287,345      12/21/88        02/09/93        08/30/01
5,195,242       07/897,579      06/11/92        03/23/93        08/28/01
5,201,439       07/891,184      06/01/92        04/13/93        08/29/01
5,209,093       07/877,719      05/04/92        05/11/93        08/30/01
5,227,800       07/764,656      09/24/91        07/13/93        08/29/01
5,467,532       08/262,646      06/20/94        11/21/95        08/30/01
5,511,905       08/143,359      10/26/93        04/30/96        08/29/01
5,547,238       08/238,538      05/05/94        08/20/96        08/29/01
5,570,515       08/500,142      07/10/95        11/05/96        08/27/01
5,584,455       08/362,561      02/09/95        12/17/96        08/15/01
5,588,483       08/590.083      01/26/96        12/31/96        08/24/01
5,597,003       08/520,094      08/28/95        01/28/97        08/29/01
5,623,335       08/433,749      05/04/95        04/22/97        08/15/01
5,624,218       08/509,429      09/12/95        04/29/97        08/10/01
5,626,155       08/391,727      02/21/95        05/06/97        08/27/01
5,634,581       08/373,092      01/17/95        06/03/97        08/27/01
5,635,895       08/195,318      02/14/94        06/03/97        08/27/01
5,641,781       08/613,843      03/11/96        06/24/97        08/15/01
5,642,613       08/600,161      02/12/96        07/01/97        08/30/01
5,645,815       08/439,905      05/12/95        07/08/97        08/30/01