Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8299690 | Stator structure and rotating electrical machine using the same | Yukihiko Hayakawa | 2012-10-30 |
| 7459813 | Magnet rotor and electromagnetically-driving device using the same, and optical apparatus with light quantity-control device | Hiroaki Naganuma | 2008-12-02 |
| 7344255 | Light amount adjusting apparatus and projector using the same | Toyoyuki Hara, Katura Nakajima, Yukihiko Hayakawa | 2008-03-18 |