Granted Patent
Utility
US 4,195,654 · App. 05/905,076
Additive injection valve
Inventor:
Ralph J. Coley
Patented Case
View Patent ↗
Granted: Apr 1, 1980
Filed: May 11, 1978
Inventor
Ralph J. Coley
Assignee (at issue)
The Firestone Tire & Rubber Company
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.