Granted Patent
Utility
US 4,702,275 · App. 06/862,466
Post assembly for a buried valve
Inventors:
John V. Ballun, Lorand H. Gain, Jr.
Patented Case
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Granted: Oct 27, 1987
Filed: May 12, 1986
Inventors
John V. Ballun
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.