Granted Patent
Utility
US 4,391,367 · App. 06/258,876
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Inventor:
Lucio C. Perego
Patented Case
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Granted: Jul 5, 1983
Filed: Apr 29, 1981
Inventor
Lucio C. Perego
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.