Granted Patent
Utility
US 4,904,991 · App. 07/126,983
Display unit subject to ambient light having light-reflective and light-emitting display elements
Inventor:
John W. Jones
Patented Case
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Granted: Feb 27, 1990
Filed: Nov 30, 1987
Inventor
John W. Jones
Assignee (at issue)
Smiths Industries Public Limited 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.