Granted Patent
Utility
US 6,054,802 · App. 09/029,032
Cathode for electronic tube
Inventors:
Takuya Ohira, Masato Saito, Hiroyuki Teramoto
Patented Case
View Patent ↗
Granted: Apr 25, 2000
Filed: Feb 20, 1998
Inventors
Takuya Ohira
Masato Saito
Hiroyuki Teramoto
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.