Granted Patent
Utility
US 4,197,822 · App. 05/768,181
Circuit means and apparatus for controlling the air-fuel ratio supplied to a combustion engine
Inventor:
Chong L. Tsiang
Patented Case
View Patent ↗
Granted: Apr 15, 1980
Filed: Feb 14, 1977
Inventor
Chong L. Tsiang
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.