Granted Patent
Utility
US 4,697,997 · App. 06/840,993
Rotary gerotor hydraulic device with fluid control passageways through the rotor
Inventor:
Hollis N. White, Jr.
Patented Case
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Granted: Oct 6, 1987
Filed: Mar 14, 1986
Inventor
Hollis N. White, Jr.
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.