Granted Patent
Utility
US 4,825,624 · App. 07/125,414
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Inventor:
Victor Calcerano
Patented Case
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Granted: May 2, 1989
Filed: Nov 25, 1987
Inventor
Victor Calcerano
Assignee (at issue)
Duracell 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.