Granted Patent
Utility
US 4,765,589 · App. 07/033,101
Device for regulating or varying the rotation angle of a control shaft of a valve or gate
Inventor:
Bernard Sauze
Patented Case
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Granted: Aug 23, 1988
Filed: Mar 5, 1987
Inventor
Bernard Sauze
Assignee (at issue)
Dresser Industries, Inc.
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.