Granted Patent
Utility
US 4,982,822 · App. 06/936,527
Control system for controlling the line pressure in a continuously variable transmission
Inventors:
Werner P. Petzold, William P. Umlauf
Patented Case
View Patent ↗
Granted: Jan 8, 1991
Filed: Dec 1, 1986
Inventors
Werner P. Petzold
William P. Umlauf
Assignee (at issue)
BorgWarner Inc.
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.