Granted Patent
Utility
US 5,340,231 · App. 07/809,645
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Inventors:
Richard M. Steere, Sidney A. Heenan
Patented Case
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Granted: Aug 23, 1994
Filed: Dec 10, 1991
Inventors
Richard M. Steere
Sidney A. Heenan
Assignee (at issue)
Stimsonite 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.