Patent Reinstated Due to the Acceptance of a Late Maintenance Fee From 12/03/99 Patent Serial Filing Issue Granted Number Number Date Date Date 4,562,328 06/648,684 09/10/84 12/31/85 12/07/99 4,676,867 06/871,655 06/06/86 06/30/87 12/07/99 4,914,590 07/195,237 05/18/88 04/03/90 12/09/99 4,940,239 07/272,111 11/16/88 07/10/90 12/09/99 4,947,093 07/276,299 11/25/88 08/07/90 12/09/99 5,232,379 07/843,619 02/28/92 08/03/93 12/06/99 5,420,242 08/087,471 07/02/93 05/30/95 12/06/99 5,432,376 07/869,760 04/16/92 07/11/95 12/09/99