Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8669721 | Solid state light source based lighting device and lighting system | Koji Watanabe, Hiromitsu Mizukawa, Nobuo Ukita | 2014-03-11 |
| 7436123 | Discharge lamp ballast device and lighting appliance | Katsunobu Hamamoto, Masahiro Yamanaka, Toshiya Kanja | 2008-10-14 |
| 6696798 | Ballast circuit for operating a discharge lamp | Katsunobu Hamamoto, Hiromitsu Mizukawa | 2004-02-24 |
| 5517399 | Power supply having a chopper with an improved power factor | Tokushi Yamauchi, Masahiro Yamanaka, Yukio Yamanaka | 1996-05-14 |