Granted Patent
Utility
US 4,467,302 · App. 06/478,422
CRT Color purity adjustment apparatus
Inventor:
Warren R. Lang
Patented Case
View Patent ↗
Granted: Aug 21, 1984
Filed: Mar 24, 1983
Inventor
Warren R. Lang
Assignee (at issue)
Sperry Corp.
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.