Granted Patent
Utility
US 4,789,167 · App. 07/017,067
Pipe gasket with reinforcing means in its base self-energizing
Inventor:
Jim Housas
Patented Case
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Granted: Dec 6, 1988
Filed: Feb 20, 1987
Inventor
Jim Housas
Assignee (at issue)
Hamilton Kent Manufacturing, 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.