Granted Patent
Utility
US 4,499,405 · App. 06/265,462
Hot cathode for broad beam electron gun
Inventor:
Gary K. Loda
Patented Case
View Patent ↗
Granted: Feb 12, 1985
Filed: May 20, 1981
Inventor
Gary K. Loda
Assignee (at issue)
RPC Industries
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.