Patents Reinstated Due to the Acceptance of a Late Maintenance Fee From 02/18/00 Patent Serial Filing Issue Granted Number Number Date Date Date 4,673,456 06/777,032 09/17/85 06/16/87 02/18/00 4,984,143 07/407,392 09/14/89 01/08/91 02/23/00 5,026,726 07/448,432 12/11/89 06/25/91 02/22/00 5,800,402 07/523,153 05/14/90 01/14/92 02/23/00 5,244,167 07/747,515 08/20/91 09/14/93 02/18/00 5,257,609 07/710,091 06/04/91 11/02/93 02/18/00 5,316,748 07/990,052 12/14/92 05/31/94 02/22/00 5,456,089 08/036,395 03/24/93 10/10/95 02/23/00 5,456,395 08/030,918 03/15/93 10/10/95 02/23/00 5,456,720 08/126,166 09/23/93 10/10/95 02/23/00 5,468,425 08/283,625 08/01/94 11/21/95 02/22/00 5,469,805 08/178,755 01/07/94 11/28/95 02/23/00