Granted Patent
Utility
US 4,748,501 · App. 06/680,616
Cable converter for television signals with stereo audio signal
Inventor:
Michael Long
Patented Case
View Patent ↗
Granted: May 31, 1988
Filed: Dec 11, 1984
Inventor
Michael Long
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.