Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8354792 | Fused joint structure in a lamp tube and forming method therefor | Toyohiko Kumada | 2013-01-15 |
| 8350476 | Short arc type discharge lamp | Hirohisa Ishikawa, Hiroyoshi Kitano, Toyohiko Kumada, Takashi Yamashita, Michiko Morooka | 2013-01-08 |
| 8217576 | High pressure discharge lamp | Hirohisa Ishikawa, Toyohiko Kumada | 2012-07-10 |
| 8198816 | Extra high pressure lamp having a novel electrode structure | Atsushi Imamura, Takashi Yamashita, Tetsu Takemura | 2012-06-12 |
| 7999475 | Short arc type discharge lamp | Hirohisa Ishikawa, Toyohiko Kumada | 2011-08-16 |
| 7898180 | High pressure discharge lamp | Toyohiko Kumada | 2011-03-01 |
| 6570330 | Resistor for electron gun assembly, method of manufacturing the resistor, electron gun assembly having the resistor, and cathode-ray tube apparatus having the resistor | Yoshihisa Kaminaga | 2003-05-27 |