Granted Patent
Utility
US 5,712,490 · App. 08/754,765
Ramp cathode structures for vacuum emission
Inventor:
Arlynn W. Smith
Patented Case
View Patent ↗
Granted: Jan 27, 1998
Filed: Nov 21, 1996
Inventor
Arlynn W. Smith
Assignee (at issue)
ITT 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.