Granted Patent
Utility
US 4,497,340 · App. 06/460,476
Seal for post indicator valve assembly
Inventor:
Lorand H. Gain, Jr.
Patented Case
View Patent ↗
Granted: Feb 5, 1985
Filed: Jan 24, 1983
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.