Granted Patent
Utility
US 4,392,077 · App. 06/011,961
Deeply filtered television image display
Inventor:
Philomena C. Libman
Patented Case
View Patent ↗
Granted: Jul 5, 1983
Filed: Feb 14, 1979
Inventor
Philomena C. Libman
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.