Granted Patent
Utility
US 4,279,231 · App. 06/092,121
Apparatus for controlling the air-fuel ratio in an internal combustion engine
Inventors:
Allen W. Lindberg, Thomas R. Gantzert, Donald L. Hicks
Patented Case
View Patent ↗
Granted: Jul 21, 1981
Filed: Nov 7, 1979
Inventors
Allen W. Lindberg
Thomas R. Gantzert
Donald L. Hicks
Assignee (at issue)
ACF Industries Incorporated
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.