Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 11/24/00
   
Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,640,306        06/841,255        03/19/86        02/03/87       11/27/00
4,715,030        06/892,618        08/04/86        12/22/87       11/28/00
4,720,392        06/804,662        12/04/85        01/19/88       11/30/00
4,950,250        07/404,672        09/08/89        08/21/90       11/28/00
4,973,293        07/418,244        10/06/89        11/27/90       11/27/00
4,979,301        07/495,893        03/19/90        12/25/90       11/28/00
5,026,638        07/224,613        07/27/88        06/25/91       11/28/00
5,042,462        07/605,422        10/30/90        08/27/91       11/29/00
5,045,331        07/175,468        03/30/88        09/03/91       11/28/00
5,052,232        07/379,938        07/14/89        10/01/91       11/27/00
5,063,574        07/490,769        03/06/90        11/05/91       11/27/00
5,086,093        07/503,356        04/02/90        02/04/92       11/28/00
5,127,691        07/639,801        01/10/91        07/07/92       11/29/00
5,131,196        07/661,464        02/26/91        07/21/92       11/27/00
5,135,140        07/741,547        08/07/91        08/04/92       11/24/00
5,142,700        07/572,562        08/27/90        08/25/92       11/28/00
5,145,304        07/613,121        11/14/90        09/08/92       11/24/00
5,148,472        07/622,508        12/05/90        09/15/92       11/29/00
5,155,550        07/698,118        05/10/91        10/13/92       11/30/00
5,372,274        07/979,324        11/20/92        12/13/94       11/29/00
5,377,163        08/146,738        11/01/93        12/27/94       11/29/00
5,395,517        08/259,918        06/10/94        03/07/95       11/28/00
5,453,126        08/323,165        10/13/94        09/26/95       11/29/00
5,461,949        08/218,429        03/28/94        10/31/95       11/29/00
5,492,442        08/201,018        02/24/94        02/20/96       11/24/00
5,494,160        08/318,868        10/17/94        02/27/96       11/28/00
5,518,617        08/211,828        04/18/94        05/21/96       11/29/00
5,524,456        08/546,405        10/20/95        06/11/96       11/29/00
5,529,698        08/232,037        04/26/94        06/25/96       11/28/00
5,532,469        08/377,988        01/25/95        07/02/96       11/29/00
5,541,803        08/206,966        03/07/94        07/30/96       11/30/00
5,551,274        08/343,085        11/21/94        09/03/96       11/28/00
5,553,881        08/377,931        01/25/95        09/10/96       11/29/00
5,567,785        08/107,076        08/17/93        10/22/96       11/28/00