Granted Patent
Utility
US 4,832,458 · App. 07/105,557
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Inventors:
James L. Fergason, Robert Parker
Patented Case
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Granted: May 23, 1989
Filed: Oct 5, 1987
Inventors
James L. Fergason
Robert Parker
Assignee (at issue)
Talig 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.