Granted Patent
Utility
US 5,852,931 · App. 08/809,894
Automatic transmission with a positive-displacement pump
Inventors:
Michael Reichenmiller, Gerald Rowe, Franz Lacher, Wolf Schmid
Patented Case
View Patent ↗
Granted: Dec 29, 1998
Filed: Apr 7, 1997
Inventors
Michael Reichenmiller
Gerald Rowe
Franz Lacher
Wolf Schmid
Assignee (at issue)
ZF Friedrichshafen AG
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.