Granted Patent
Utility
US 4,855,713 · App. 07/254,578
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Inventor:
Robert E. Brunius
Patented Case
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Granted: Aug 8, 1989
Filed: Oct 7, 1988
Inventor
Robert E. Brunius
Assignee (at issue)
Interactive Technologies, Inc.
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.