Granted Patent
Utility
US 5,799,564 · App. 08/623,426
Spring brake actuator having two-ply pressure plate assembly
Inventor:
William C. Pierce
Patented Case
View Patent ↗
Granted: Sep 1, 1998
Filed: Mar 28, 1996
Inventor
William C. Pierce
Assignee (at issue)
Nai Anchorlok, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.