Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6812643 | Fluorescent luminous tube | Hiroaki Kawasaki, Yukio Ogawa, Katsumi Takayama | 2004-11-02 |
| 6798149 | Fluorescent luminous tube and method for producing same | Hiroyuki Suzuki, Katsutoshi Iida, Yukio Ogawa | 2004-09-28 |
| 6717350 | Electron tube and method of manufacturing the same | Yukio Ogawa, Yasuhiro Nohara, Hiroaki Kawasaki | 2004-04-06 |
| 6710536 | Display device using filament | Yukio Ogawa, Kazuyoshi Ishikawa, Katsutoshi Kogo, Satoshi Yoshimura | 2004-03-23 |