Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10368408 | Light emitting device and LED light bulb | Hiroyasu Kondo, Masahiko Yamakawa, Yasuhiro Shirakawa, Ryoji Tsuda, Atsuji Nakagawa +1 more | 2019-07-30 |
| 10368409 | Light emitting device and LED light bulb | Hiroyasu Kondo, Masahiko Yamakawa, Yasuhiro Shirakawa, Ryoji Tsuda, Atsuji Nakagawa +1 more | 2019-07-30 |
| 9732278 | Petroleum coke and production method for same | Hiroshi Kawachi, Kazuhisa Nakanishi, Takashi Oyama | 2017-08-15 |
| 9148926 | LED lamp | Atsuji Nakagawa | 2015-09-29 |
| 8226921 | Raw coke for electricity storage carbon material and needle coke | Takashi Oyama, Kazuhisa Nakanishi, Tamotsu Tano, Keiji Higashi, Ippei Fujinaga +7 more | 2012-07-24 |
| 8197788 | Raw coke for electricity storage carbon material and needle coke | Takashi Oyama, Kazuhisa Nakanishi, Tamotsu Tano, Keiji Higashi, Ippei Fujinaga +7 more | 2012-06-12 |
| 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 | Atsuji Nakagawa | 2011-10-18 |
| 7959888 | Raw coke for electricity storage carbon material and needle coke | Takashi Oyama, Kazuhisa Nakanishi, Tamotsu Tano, Keiji Higashi, Ippei Fujinaga +7 more | 2011-06-14 |
| 7808167 | High-pressure discharge lamp and light sources device using the same | Atsuji Nakagawa, Hiroki Takahashi, Tomihiko Ikeda | 2010-10-05 |
| 7576494 | High voltage discharge lamp lighting method, lighting apparatus and image device using that lighting apparatus | Atuji Nakagawa, Hisao Furukawa, Kouichi Odani | 2009-08-18 |
| 7517093 | Projection-type system and method of operating the same | Atsuji Nakagawa | 2009-04-14 |
| 7504780 | Power supply unit for light source and method of controlling the same | Shiro Isobe, Tomotaka Mori, Atsuji Nakagawa | 2009-03-17 |
| 7478928 | Light source device | Shinichi Ushijima, Atsuji Nakagawa | 2009-01-20 |
| 7348737 | Lighting circuit for high-pressure discharge lamp | Atsuji Nakagawa | 2008-03-25 |
| 7306340 | Projection system using a high-pressure discharge lamp adapted to d.c. lighting, and method of operating the same | Atsuji Nakagawa | 2007-12-11 |
| 7227827 | Optical information recording apparatus, optical information reproducing apparatus, optical information recording/reproducing apparatus, and optical information recording medium | Hideyoshi Horimai, Mitsuteru Inoue | 2007-06-05 |
| 6914393 | Method and device for lighting high pressure discharge lamps | Atsuji Nakagawa | 2005-07-05 |
| 6788009 | Method and device for lighting ultra-high pressure discharge lamps | Andrei Kazmierski | 2004-09-07 |
| 6743465 | Magnetic optical member with a polymer substrate | Mitsuteru Inoue, Akio Takayama, Atsushi Kitamura, Shigeyuki Adachi, Hideki Kato | 2004-06-01 |
| 6421303 | MULTILAYER RESONANCE DEVICE AND MAGNETO-OPTICAL RECORDING MEDIUM WITH MAGNETIC CENTER LAYER OF A DIFFERENT THICKNESS THAN THAT OF THE COMPONENTS OF THE REFLECTING LAYERS, AND METHOD OF REPRODUCING THE SAME | Mitsuteru Inoue, Kenichi Arai, Masanori Abe, Koji Matsumoto | 2002-07-16 |
| 6359722 | Optical isolator with a compact dimension | Mitsuteru Inoue, Akio Takayama, Atsushi Kitamura, Shigeyuki Adachi, Hideki Kato | 2002-03-19 |
| 6285130 | Metal halide lamp | Atsuji Nakagawa, Tetsuya Shirai, Tatsuo Yamamoto, Tomihiko Ikeda | 2001-09-04 |
| 6262949 | Multilayer resonance device and magneto-optical recording medium with magnetic center layer of a different thickness than that of the components of the reflecting layers | Mitsuteru Inoue, Kenichi Arai, Masanori Abe, Koji Matsumoto | 2001-07-17 |
| 5273836 | Magnetooptic recording material | Naoshi Horiai, Tadao Tokushima, Michihiko Kubota | 1993-12-28 |
| 5164349 | Electromagnetic effect material | Atsushi Kajima, Kyoji Ohdan, Ryoji Sugise, Iwao Okamoto | 1992-11-17 |