Granted Patent
Utility
US 3,962,572 · App. 05/588,641
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Inventor:
Albert Donald Stolzy
Patented Case
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Granted: Jun 8, 1976
Filed: Jun 19, 1975
Inventor
Albert Donald Stolzy
Assignee (at issue)
International Telephone and Telegraph Corporation
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.