Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7014585 | Blade-type chain tensioner system | Yasuo Horikawa, Toru Okazaki | 2006-03-21 |
| 6808467 | Blade tensioner and system for a chain | Hiroyuki Takeda, Shinji Tsuruta, Sadao Kojima, Akira Terao, Kensuke Nakamura +2 more | 2004-10-26 |
| 6616557 | Clip for blade tensioner and blade tensioner with clip | Shinji Tsuruta | 2003-09-09 |