Granted Patent
Utility
US 4,635,901 · App. 06/601,306
Position indicator for valves
Inventor:
Richard J. Pond
Patented Case
View Patent ↗
Granted: Jan 13, 1987
Filed: Apr 17, 1984
Inventor
Richard J. Pond
Assignee (at issue)
SMITH INTERNATIONAL, INC.
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.