Granted Patent
Utility
US 4,893,807 · App. 07/273,948
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Inventor:
Paul W. Ahrens
Patented Case
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Granted: Jan 16, 1990
Filed: Nov 21, 1988
Inventor
Paul W. Ahrens
Assignee (at issue)
Miracle Recreation Equipment 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.