Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9016666 | Load sensing transmission and hoisting machine including the same | — | 2015-04-28 |
| 7614610 | Hoisting and pulling device | Koji Koyama | 2009-11-10 |
| 7575223 | Overload preventing apparatus in hoist | Koji Koyama | 2009-08-18 |
| 7441748 | Hoisting and pulling device | Toshiaki Sakai | 2008-10-28 |
| 7401765 | Winching and drawing machine | Takayoshi Nakamura, Toshiaki Sakai, Tsukasa Yamaguchi | 2008-07-22 |
| D541000 | Hoist | Koji Koyama, Michio Fukasawa | 2007-04-17 |
| D482507 | Hoist | Takayoshi Nakamura | 2003-11-18 |
| D482174 | Hoist | Takayoshi Nakamura | 2003-11-11 |