Granted Patent
Utility
US 4,558,254 · App. 06/605,243
Cathode-ray tube having an improved low power cathode assembly
Inventor:
Stephen T. Opresko
Patented Case
View Patent ↗
Granted: Dec 10, 1985
Filed: Apr 30, 1984
Inventor
Stephen T. Opresko
Assignee (at issue)
RCA 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.