Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10368408 | Light emitting device and LED light bulb | Hiroyasu Kondo, Masahiko Yamakawa, Yasuhiro Shirakawa, Ryoji Tsuda, Toshitaka Fujii +1 more | 2019-07-30 |
| 10368409 | Light emitting device and LED light bulb | Hiroyasu Kondo, Masahiko Yamakawa, Yasuhiro Shirakawa, Ryoji Tsuda, Toshitaka Fujii +1 more | 2019-07-30 |
| 10056220 | Manufacturing method of high-pressure discharge lamp and sealed part structure for high-pressure discharge lamp | Hiroshi Takahashi, Takashige Yamada | 2018-08-21 |
| 9812280 | Manufacturing method of high-pressure discharge lamp and sealed part structure for high-pressure discharge lamp | Hiroshi Takahashi, Takashige Yamada | 2017-11-07 |
| 9362103 | High pressure discharge lamp and lighting method thereof | Hiroshi Takahashi, Tomihiko Ikeda, Shinichi Ushijima, Tetsuya Gouda | 2016-06-07 |
| 9148926 | LED lamp | Toshitaka Fujii | 2015-09-29 |
| 9099293 | Method and circuit for lighting high-pressure discharge lamp | Shiyoshi Cho, Shinichi Ushijima, Tetsuya Gouda | 2015-08-04 |
| 8040077 | Starting circuit of starting device for high-pressure discharge lamp including auxiliary light source, starting device including the starting circuit, and lighting system including the starting device | Toshitaka Fujii | 2011-10-18 |
| 7808167 | High-pressure discharge lamp and light sources device using the same | Toshitaka Fujii, Hiroki Takahashi, Tomihiko Ikeda | 2010-10-05 |
| 7517093 | Projection-type system and method of operating the same | Toshitaka Fujii | 2009-04-14 |
| 7504780 | Power supply unit for light source and method of controlling the same | Shiro Isobe, Tomotaka Mori, Toshitaka Fujii | 2009-03-17 |
| 7478928 | Light source device | Shinichi Ushijima, Toshitaka Fujii | 2009-01-20 |
| 7348737 | Lighting circuit for high-pressure discharge lamp | Toshitaka Fujii | 2008-03-25 |
| 7306340 | Projection system using a high-pressure discharge lamp adapted to d.c. lighting, and method of operating the same | Toshitaka Fujii | 2007-12-11 |
| 6914393 | Method and device for lighting high pressure discharge lamps | Toshitaka Fujii | 2005-07-05 |
| 6713963 | Ultra-high pressure discharge lamp | — | 2004-03-30 |
| 6713972 | ULTRA-HIGH PRESSURE DISCHARGE LAMP LIGHTING METHOD, ULTRA-HIGH PRESSURE DISCHARGE LAMP TO WHICH THE METHOD IS APPLICABLE AND BALLAST FOR USE THEREIN, AND LIGHTING SYSTEM INCORPORATING THE LAMP AND THE BALLAST | Toshitaka Hujii, Hisao Hurukawa, Tomihiko Ikeda, Tetsuya Shirai | 2004-03-30 |
| 6600266 | Mount for lamp and lamp seal structure employing the mount | — | 2003-07-29 |
| 6509674 | Discharge lamp with ventilation passage | — | 2003-01-21 |
| 6335593 | Electric discharge lamp with an improved sealing structure improving uniformity of light output and method of making | — | 2002-01-01 |
| 6285130 | Metal halide lamp | Toshitaka Fujii, Tetsuya Shirai, Tatsuo Yamamoto, Tomihiko Ikeda | 2001-09-04 |
| 6242861 | Direct current discharge lamp and light source having the discharge lamp attached to reflector | — | 2001-06-05 |