Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7336418 | Optical attenuator | Hirotaka Kawai, Hiromitsu Umezawa, Isao Kojima, Hidenori Nakata | 2008-02-26 |
| 7024073 | Reflective variable light attenuator | Hidenori Nakada, Shohei Abe, Isao Kojima, Keisuke Ikeda | 2006-04-04 |
| 7006273 | Faraday rotation device and optical device using same | Hidenori Nakada, Hirotaka Kawai, Isao Kojima, Tsugio Tokumasu | 2006-02-28 |
| 6876480 | Farady rotation device and optical device comprising it | Hidenori Nakada, Hirotaka Kawai, Isao Kojima, Tsugio Tokumasu | 2005-04-05 |