Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7878315 | Spring clutch | Masafumi Nakakoji, Katsumi Furutani, Koji Akiyoshi, Tomoaki Makino | 2011-02-01 |
| 7874413 | Rotation transmission device | Koji Akiyoshi, Takanobu Sato, Masako Ashimori | 2011-01-25 |