Granted Patent
Utility
US 6,431,815 · App. 09/667,271
Foldable retractable loading ramp assembly
Inventors:
James Zarzecki, Charles McMenamy, Richard Roberts
Patented Case
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Granted: Aug 13, 2002
Filed: Sep 22, 2000
Inventors
James Zarzecki
Charles McMenamy
Richard Roberts
Assignee (at issue)
Bustin Industrial Products, 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.