Granted Patent
Utility
US 4,995,766 · App. 07/392,875
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Inventor:
Robert L. Coleman
Patented Case
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Granted: Feb 26, 1991
Filed: Aug 14, 1989
Inventor
Robert L. Coleman
Assignee (at issue)
GTE Valenite 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.