Granted Patent
Utility
US 4,741,475 · App. 07/011,293
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Inventor:
John Anthony Thomas Norman
Patented Case
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Granted: May 3, 1988
Filed: Feb 5, 1987
Inventor
John Anthony Thomas Norman
Assignee (at issue)
Uarco Incorporated
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.