Granted Patent
Utility
US 4,372,379 · App. 06/309,004
Rotary drive assembly for downhole rotary pump
Inventors:
Emanuel Kulhanek, John Aboussafy
Patented Case
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Granted: Feb 8, 1983
Filed: Oct 6, 1981
Inventors
Emanuel Kulhanek
John Aboussafy
Assignee (at issue)
Corod Manufacturing Ltd.
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.