Granted Patent
Utility
US 5,612,874 · App. 08/434,235
Multiple ratio automatic transmission with solenoid operated valves for effecting pressure buildup
Inventors:
Winfried Schulz, Johann Kirchhoffer
Patented Case
View Patent ↗
Granted: Mar 18, 1997
Filed: May 4, 1995
Inventors
Winfried Schulz
Johann Kirchhoffer
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.