Granted Patent
Utility
US 4,222,187 · App. 06/011,381
Display device
Inventor:
David N. Huck
Patented Case
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Granted: Sep 16, 1980
Filed: Feb 12, 1979
Inventor
David N. Huck
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.