Patents Reinstated Due to the Acceptance of a Late Maintenance Fee From 03/13/98 Patent Serial Filing Issue Granted Number Number Date Date Date 4,625,344 06/756,287 07/18/85 12/02/86 03/17/98 4,720,386 06/307,191 09/30/81 01/19/88 03/16/98 4,848,141 07/178,397 04/06/88 07/18/89 03/17/98 4,850,313 07/155,823 02/16/88 07/25/89 03/16/98 4,880,437 07/171,089 03/21/88 11/14/89 03/16/98 5,234,919 07/739,399 08/02/91 08/10/93 03/18/98