Granted Patent
Utility
US 6,583,567 · App. 09/808,041
Electron tube device mounted with a cold cathode and a method of impressing voltages on electrodes of the electron tube device
Inventors:
Shunji Tsuida, Hironori Imura, Hideo Makishima
Patented Case
View Patent ↗
Granted: Jun 24, 2003
Filed: Mar 15, 2001
Inventors
Shunji Tsuida
Hironori Imura
Hideo Makishima
Assignee (at issue)
NEC Microwave Tube, Ltd.
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.