Granted Patent
Utility
US 5,240,789 · App. 07/839,337
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Inventors:
Thomas J. Breen, Jay A. Luft
Patented Case
View Patent ↗
Granted: Aug 31, 1993
Filed: Feb 20, 1992
Inventors
Thomas J. Breen
Jay A. Luft
Assignee (at issue)
Rand McNally & Company
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.