Patents Reinstated Due to the Acceptance of a
                       Late Maintenance Fee From 3/30/01

Patent          Serial          Filing          Issue           Granted
Number          Number          Date            Date            Date

4,650,475       06/756,108      07/18/85        03/17/87        04/05/01
4,659,343       06/774,251      09/09/85        04/21/87        04/05/01
4,661,966       06/777,021      09/17/85        04/28/87        04/02/01
4,740,014       06/939,814      12/09/86        04/26/88        03/30/01
4,760,026       06/931,880      11/17/86        07/26/88        04/05/01
4,785,271       07/124,639      11/24/87        11/15/88        04/05/01
4,789,637       06/912,713      09/29/86        12/06/88        04/05/01
4,793,821       06/832,403      02/24/86        12/27/88        04/05/01
4,795,287       07/004,634      01/20/87        01/03/89        03/30/01
5,046,222       07/604,812      10/26/90        09/10/91        04/03/01
5,149,224       07/384,788      07/25/89        09/22/92        03/30/01
5,150,095       07/680,523      04/04/91        09/22/92        04/05/01
5,160,906       07/720,143      06/24/91        11/03/92        04/05/01
5,172,429       07/714,496      06/13/91        12/22/92        04/05/01
5,190,027       07/868,308      04/14/92        03/02/93        04/05/01
5,398,802       08/126,924      09/27/93        03/21/95        04/05/01
5,399,140       08/268,031      06/29/94        03/21/95        04/05/01
5,414,214       08/265,985      06/27/94        05/09/95        04/04/01
5,439,883       08/228,749      04/18/94        08/08/95        03/30/01
5,454,965       08/108,477      08/18/93        10/03/95        03/30/01
5,482,221       08/280,116      07/25/94        01/09/96        04/03/01
5,488,885       08/285,706      08/04/94        02/06/96        04/05/01
5,489,057       08/130,292      10/01/93        02/06/96        03/30/01
5,514,927       08/203,469      02/28/94        05/07/96        04/05/01
5,528,017       08/316,207      09/30/94        06/18/96        04/03/01
5,555,381       08/451,517      05/26/95        09/10/96        04/04/01
5,592,072       08/377,575      01/24/95        01/07/97        04/03/01
5,600,840       08/370,595      01/10/95        02/04/97        04/03/01