Patents Reinstated Due to the Acceptance of a
                       Late Maintenance Fee From 7/13/01

Patent          Serial          Filing          Issue           Granted
Number          Number          Date            Date            Date

4,695,736       06/799,045      11/18/85        09/22/87        07/16/01
4,791,674       07/108,776      10/14/87        12/13/88        07/13/01
4,842,361       07/230,645      08/10/88        06/27/89        07/16/01
5,126,966       07/467,297      01/18/90        06/30/92        07/13/01
5,129,128       07/722,370      06/25/91        07/14/92        07/16/01
5,179,653       07/677,579      03/29/91        01/12/93        07/13/01
5,188,178       07/738,755      08/01/91        02/23/93        07/16/01
5,199,577       07/750,288      08/27/91        04/06/93        07/19/01
5,201,324       07/732,109      07/18/91        04/13/93        07/13/01
5,214,803       07/804,088      02/19/92        06/01/93        07/18/01
5,293,887       07/848,038      03/09/92        03/15/94        07/13/01
5,308,242       07/889,072      05/26/92        05/03/94        07/13/01
5,537,750       08/440,788      05/15/95        07/23/96        07/19/01
5,550,562       08/420,707      04/11/95        08/27/96        07/17/01
5,570,056       08/485,088      06/07/95        10/29/96        07/19/01
5,588,833       08/340,645      11/16/94        12/31/96        07/18/01
5,595,172       08/289,207      08/12/94        01/21/97        07/13/01
5,606,772       08/382,694      02/02/95        03/04/97        07/13/01
5,608,998       08/400,900      03/08/95        03/11/97        07/16/01
5,622,010       08/516,616      08/18/95        04/22/97        07/17/01
5,631,528       08/434,764      05/04/95        05/20/97        07/17/01
5,689,039       08/212,188      03/16/94        11/18/97        07/16/01