Granted Patent
Utility
US 5,821,693 · App. 08/510,739
Electron beam tubes having a unitary envelope having stepped inner surface
Inventors:
Graham Douglas White, David Mark Wilcox
Patented Case
View Patent ↗
Granted: Oct 13, 1998
Filed: Aug 3, 1995
Inventors
Graham Douglas White
David Mark Wilcox
Assignee (at issue)
EEV Limited
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.