Granted Patent
Utility
US 4,395,985 · App. 06/300,132
Throttle valve closure sensing switch
Inventor:
William A. Hagen
Patented Case
View Patent ↗
Granted: Aug 2, 1983
Filed: Sep 8, 1981
Inventor
William A. Hagen
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.