Patents Reinstated Due to the Acceptance of a Late Maintenance Fee From 07/24/98 Patent Serial Filing Issue Granted Number Number Date Date Date 4,534,923 06/548,453 11/03/83 08/13/85 07/24/98 4,752,170 06/903,636 09/04/86 06/21/88 07/28/98 5,125,647 07/492,640 03/13/90 06/30/92 07/28/98 5,141,224 07/790,453 11/12/91 08/25/92 07/27/98 5,281,107 07/944,675 09/15/92 01/25/94 07/24/98