Granted Patent
Utility
US 6,190,261 · App. 09/153,444
Pump assembly shaft guard
Inventor:
Jack Joseph Powell
Patented Case
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Granted: Feb 20, 2001
Filed: Sep 15, 1998
Inventor
Jack Joseph Powell
Assignee (at issue)
Flowserve Management 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.