Granted Patent
Utility
US 4,263,821 · App. 06/073,913
Crank arm for a windshield wiper drive mechanism
Inventors:
Jack W. Savage, Ralph J. Unterborn
Patented Case
View Patent ↗
Granted: Apr 28, 1981
Filed: Sep 10, 1979
Inventors
Jack W. Savage
Ralph J. Unterborn
Assignee (at issue)
General Motors LLC
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.