Granted Patent
Utility
US 5,611,371 · App. 08/629,156
Shift/regulating valve for controlling an hydrodynamic torque converter for an automatic transmission
Inventor:
Hans-Peter Wirtz
Patented Case
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Granted: Mar 18, 1997
Filed: Apr 8, 1996
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.