Granted Patent
Utility
US 5,217,317 · App. 07/634,753
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Inventor:
Daniel E. Young
Patented Case
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Granted: Jun 8, 1993
Filed: Dec 27, 1990
Inventor
Daniel E. Young
Assignee (at issue)
United Steel Products Company
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.