Granted Patent
Utility
US 4,400,992 · App. 06/192,078
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Inventor:
Manuel P. Londres
Patented Case
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Granted: Aug 30, 1983
Filed: Sep 29, 1980
Inventor
Manuel P. Londres
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.