Patents Reinstated Due to the Acceptance of a Late Maintenance Fee From 01/07/00 Patent Serial Filing Issue Granted Number Number Date Date Date 4,606,623 06/316,665 10/30/81 08/19/86 01/11/00 4,683,964 06/791,217 10/25/85 08/04/87 01/10/00 4,820,957 07/126,308 11/27/87 04/11/89 01/10/00 4,875,154 07/061,338 06/12/87 10/17/89 01/13/00 4,937,966 07/444,281 12/01/89 07/03/90 01/12/00 5,008,959 07/486,374 02/28/90 04/23/91 01/12/00 5,010,010 07/393,851 08/14/89 04/23/91 01/11/00 5,265,584 07/764,893 09/24/91 11/30/93 01/11/00 5,283,611 07/786,488 11/01/91 02/01/94 01/10/00 5,375,572 08/130,244 10/01/93 12/27/94 01/12/00 5,391,721 08/013,308 02/04/93 02/21/95 01/12/00 5,453,783 07/940,261 09/02/92 09/26/95 01/10/00