Granted Patent
Utility
US 4,793,454 · App. 07/025,391
Continuously variable transmission clutch control system
Inventors:
Werner P. Petzold, Alan L. Miller, William P. Umlauf
Patented Case
View Patent ↗
Granted: Dec 27, 1988
Filed: Mar 13, 1987
Inventors
Werner P. Petzold
Alan L. Miller
William P. Umlauf
Assignee (at issue)
Borg-Warner Automotive, 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.