Granted Patent
Utility
US 4,475,638 · App. 06/331,537
Transmission brake and clutch
Inventor:
Stephen J. McCormick
Patented Case
View Patent ↗
Granted: Oct 9, 1984
Filed: Dec 17, 1981
Inventor
Stephen J. McCormick
Assignee (at issue)
Allis-Chalmers Corporation
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.