Granted Patent
Utility
US 4,310,998 · App. 06/151,840
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Inventor:
Ronald R. Cuba
Patented Case
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Granted: Jan 19, 1982
Filed: May 21, 1980
Inventor
Ronald R. Cuba
Assignee (at issue)
Gilson Brothers
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.