Granted Patent
Utility
US 4,223,651 · App. 06/009,558
Solenoid vacuum control valve means and apparatus and system for controlling the air-fuel ratio supplied to a combustion engine
Inventors:
Philip V. Eshelman, Ronald E. Herman
Patented Case
View Patent ↗
Granted: Sep 23, 1980
Filed: Feb 6, 1979
Inventors
Philip V. Eshelman
Ronald E. Herman
Assignee (at issue)
Colt Industries Operating Corporation
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.