Granted Patent
Utility
US 4,476,488 · App. 06/478,607
Control circuit for CATV alert system
Inventor:
Richard G. Merrell
Patented Case
View Patent ↗
Granted: Oct 9, 1984
Filed: Mar 23, 1983
Inventor
Richard G. Merrell
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.