Granted Patent
Utility
US 4,368,485 · App. 06/253,425
Billboard large screen TV
Inventor:
Richard W. Midland
Patented Case
View Patent ↗
Granted: Jan 11, 1983
Filed: Apr 13, 1981
Inventor
Richard W. Midland
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.