Granted Patent
Utility
US 5,166,797 · App. 07/633,837
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Inventor:
Richard Barry Angell
Patented Case
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Granted: Nov 24, 1992
Filed: Dec 26, 1990
Inventor
Richard Barry Angell
Assignee (at issue)
GRASS VALLEY LIMITED
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.