Granted Patent
Utility
US 4,388,639 · App. 06/264,773
Color control circuit for teletext-type decoder
Inventors:
Charles Cox, Rudolf Turner
Patented Case
View Patent ↗
Granted: Jun 14, 1983
Filed: May 18, 1981
Inventors
Charles Cox
Rudolf Turner
Assignee (at issue)
Zenith Radio Corporation
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.