Granted Patent
Utility
US 4,644,968 · App. 06/527,603
Master clutch pressure and lubrication valve
Inventor:
Probir K. Chatterjea
Patented Case
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Granted: Feb 24, 1987
Filed: Aug 29, 1983
Inventor
Probir K. Chatterjea
Assignee (at issue)
J. I. Case Company
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.