Granted Patent
Utility
US 4,293,164 · App. 06/093,075
Brake control circuit with parking and retarding valves
Inventors:
Wayne A. Hoefer, Paul J. Tanty
Patented Case
View Patent ↗
Granted: Oct 6, 1981
Filed: Aug 13, 1979
Inventors
Wayne A. Hoefer
Paul J. Tanty
Assignee (at issue)
Caterpillar Tractor Co.
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.