Granted Patent
Utility
US 4,387,816 · App. 06/340,567
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Inventor:
Richard L. Weckman
Patented Case
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Granted: Jun 14, 1983
Filed: Jan 18, 1982
Inventor
Richard L. Weckman
Assignee (at issue)
Owens-Illinois 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.