Granted Patent
Utility
US 4,829,372 · App. 07/087,668
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Inventors:
Karl W. McCalley, Steven David Wilson, James L. Fischer
Patented Case
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Granted: May 9, 1989
Filed: Aug 20, 1987
Inventors
Karl W. McCalley
Steven David Wilson
James L. Fischer
Assignee (at issue)
Telaction 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.