Granted Patent
Utility
US 4,892,246 · App. 07/293,977
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Inventor:
John Anthony Thomas Norman
Patented Case
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Granted: Jan 9, 1990
Filed: Jan 6, 1989
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.