Granted Patent
Utility
US 4,988,083 · App. 07/402,728
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Inventor:
Warren Bradley
Patented Case
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Granted: Jan 29, 1991
Filed: Sep 5, 1989
Inventor
Warren Bradley
Assignee (at issue)
Westinghouse Electric Company LLC
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.