Granted Patent
Utility
US 4,228,693 · App. 05/968,058
Transmission shift control apparatus
Inventor:
Donald W. Kelbel
Patented Case
View Patent ↗
Granted: Oct 21, 1980
Filed: Dec 11, 1978
Inventor
Donald W. Kelbel
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.