Granted Patent
Utility
US 4,653,531 · App. 06/892,368
Support for underground valve indicator
Inventor:
Lorand H. Gain, Jr.
Patented Case
View Patent ↗
Granted: Mar 31, 1987
Filed: Aug 4, 1986
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.