Granted Patent
Utility
US 4,554,480 · App. 06/556,184
Cathode-ray tube having an electron gun assembly with emissivity modifying means
Inventor:
Richard E. Schlack
Patented Case
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Granted: Nov 19, 1985
Filed: Nov 29, 1983
Inventor
Richard E. Schlack
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.