Granted Patent
Utility
US 4,688,079 · App. 06/893,420
Color CRT purity measurement
Inventor:
James R. Fendley
Patented Case
View Patent ↗
Granted: Aug 18, 1987
Filed: Aug 5, 1986
Inventor
James R. Fendley
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.