Granted Patent
Utility
US 4,538,320 · App. 06/605,163
Scraper with mitt
Inventor:
Thomas N. Batt
Patented Case
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Granted: Sep 3, 1985
Filed: Apr 30, 1984
Inventor
Thomas N. Batt
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.