Granted Patent
Utility
US 6,091,189 · App. 08/771,916
Cathode for an electron tube
Inventors:
Takashi Shinjo, Riichi Kondo, Masato Saito, Takuya Ohira, Hiroyuki Teramoto, Kinjirou Sano
Patented Case
View Patent ↗
Granted: Jul 18, 2000
Filed: Dec 23, 1996
Inventors
Takashi Shinjo
Riichi Kondo
Masato Saito
Takuya Ohira
Hiroyuki Teramoto
Kinjirou Sano
Assignee (at issue)
MITSUBISHI ELECTRIC CORPORATION
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.