Granted Patent
Utility
US 4,138,026 · App. 05/871,288
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Inventor:
Charles Conklin
Patented Case
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Granted: Feb 6, 1979
Filed: Feb 13, 1978
Inventor
Charles Conklin
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.