Granted Patent
Utility
US 4,586,885 · App. 06/679,315
Compact high torque hydraulic motors
Inventor:
Carle A. Middlekauff
Patented Case
View Patent ↗
Granted: May 6, 1986
Filed: Dec 7, 1984
Inventor
Carle A. Middlekauff
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.