Granted Patent
Utility
US 4,487,673 · App. 06/370,582
Method of making a line cathode having localized emissive coating
Inventor:
Carl C. Steinmetz
Patented Case
View Patent ↗
Granted: Dec 11, 1984
Filed: Apr 21, 1982
Inventor
Carl C. Steinmetz
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.