Patents Reinstated Due to the Acceptance of a Late Maintenance Fee From 01/21/00 Patent Serial Filing Issue Granted Number Number Date Date Date 4,527,574 06/478,795 03/25/83 07/09/85 01/24/00 4,578,955 06/678,277 12/05/84 04/01/86 01/24/00 4,629,625 06/645,446 08/29/84 12/16/86 01/24/00 4,630,524 06/639,701 08/13/84 12/23/86 01/24/00 4,638,647 06/813,319 12/24/85 01/27/87 01/24/00 4,708,710 06/844,959 03/27/86 11/24/87 01/24/00 5,008,990 07/501,015 03/29/90 04/23/91 01/21/00