Granted Patent
Utility
US 4,886,999 · App. 07/295,883
Cathode ray tube apparatus with quadrupole electrode structure
Inventors:
Hisakazu Yamane, Ritsuo Ishida, Hisao Nakanishi, Keiji Yanai, Masayuki Toshiyasu, Kazunori Ikegami, Soichiro Okuda, Kenji Kimura, Koji Ishibata, Yoshinori Ishii
Patented Case
View Patent ↗
Granted: Dec 12, 1989
Filed: Jan 11, 1989
Inventors
Hisakazu Yamane
Ritsuo Ishida
Hisao Nakanishi
Keiji Yanai
Masayuki Toshiyasu
Kazunori Ikegami
Soichiro Okuda
Kenji Kimura
Koji Ishibata
Yoshinori Ishii
Assignee (at issue)
Mitsubisih Denki Kabushiki Kaisha
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.