Granted Patent
Utility
US 4,369,401 · App. 06/144,381
Valve position monitor and control system
Inventors:
Robert W. Fayfield, Kenneth B. Fontaine
Patented Case
View Patent ↗
Granted: Jan 18, 1983
Filed: Apr 28, 1980
Inventors
Robert W. Fayfield
Kenneth B. Fontaine
Assignee (at issue)
Scovill Manufacturing Co.
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.