Granted Patent
Utility
US 5,281,923 · App. 07/730,166
Amplifying arrangements which modulate an electron beam
Inventor:
Roy Heppinstall
Patented Case
View Patent ↗
Granted: Jan 25, 1994
Filed: Jul 16, 1991
Inventor
Roy Heppinstall
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.