Granted Patent
Utility
US 6,124,666 · App. 08/979,566
Electron tube cathode
Inventors:
Masato Saito, Hiroyuki Teramoto, Takuya Ohira
Patented Case
View Patent ↗
Granted: Sep 26, 2000
Filed: Nov 26, 1997
Inventors
Masato Saito
Hiroyuki Teramoto
Takuya Ohira
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.