Granted Patent
Utility
US 4,817,765 · App. 07/099,632
Backing plate assembly for a drum brake
Inventors:
John L. Turak, Robert Spaargaren
Patented Case
View Patent ↗
Granted: Apr 4, 1989
Filed: Sep 22, 1987
Inventors
John L. Turak
Robert Spaargaren
Assignee (at issue)
ALLIED CONSULTING, 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.