Granted Patent
Utility
US 4,468,690 · App. 06/504,650
Beam index color display system
Inventor:
Richard W. Midland
Patented Case
View Patent ↗
Granted: Aug 28, 1984
Filed: Jun 15, 1983
Inventor
Richard W. Midland
Assignee (at issue)
Zenith Electronics LLC
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.