Granted Patent
Utility
US 5,019,141 · App. 07/596,201
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Inventors:
Jeffrey H. Granville, John P. Church, David H. Hodgkins
Patented Case
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Granted: May 28, 1991
Filed: Oct 11, 1990
Inventors
Jeffrey H. Granville
John P. Church
David H. Hodgkins
Assignee (at issue)
Parker-Hannifin 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.