Patent Reinstated Due to the Acceptance of a Late Maintenance Fee From 11/19/99 Patent Serial Filing Issue Granted Number Number Date Date Date 4,865,894 07/107,686 10/13/87 09/12/89 11/22/99 4,927,503 07/308,596 02/10/89 05/22/90 11/24/99 4,968,540 07/280,432 12/06/88 11/06/90 11/23/99 5,252,787 07/697,784 05/09/91 10/12/93 11/22/99 5,289,783 07/951,778 09/28/92 03/01/94 11/22/99 5,297,946 07/971,683 11/04/92 03/29/94 11/22/99 5,368,304 08/054,406 04/28/93 11/29/94 11/23/99 5,375,647 08/101,462 08/02/93 12/27/94 11/22/99 5,379,270 08/217,816 03/25/94 01/03/95 11/22/99 5,422,167 08/123,323 09/17/93 06/06/95 11/22/99 5,441,362 08/128,426 09/30/93 08/15/95 11/22/99