Showing 1–7 of 7 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Yoshiharu Yamaguchi | Yoshida Kogyo K.K. | 2 |
| 1 | Yasuharu Okazaki | Hitachi Construction Machinery Co. | 2 |
| 1 | Hideaki Matsuo | Sumitomo Electric Industries | 2 |
| #4 | Takashi Ishioka | Kabushiki Kaisha Toshiba | 1 |
| #4 | Hiroyoshi Nakazato | Frontier Cooperative | 1 |
| #4 | Isao Hagiwara | Mitsubishi Gas Chemical Company | 1 |
| #4 | Tsutomu Hamatani | Yoshida Kogyo K.K. | 1 |