Granted Patent
Utility
US 4,411,288 · App. 06/287,423
Valve position indicator with variable indicator plates
Inventor:
Lorand H. Gain, Jr.
Patented Case
View Patent ↗
Granted: Oct 25, 1983
Filed: Jul 27, 1981
Inventor
Lorand H. Gain, Jr.
Assignee (at issue)
AMSTED INDUSTRIES INCORPORATED
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.