Granted Patent
Utility
US 5,582,278 · App. 08/440,601
Pulse width modulated solenoid valve for control of hydrodynamic torque converters
Inventor:
Hans-Peter Wirtz
Patented Case
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Granted: Dec 10, 1996
Filed: May 15, 1995
Inventor
Hans-Peter Wirtz
Assignee (at issue)
Ford Motor 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.