Showing 1–6 of 6 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Yasuharu Okazaki | Hitachi Construction Machinery Co. | 2 |
| 1 | Hideo Shimai | Yoshida Kogyo K.K. | 2 |
| 3 | Takahiro Fujishiro | Hitachi | 1 |
| 3 | Isao Hagiwara | Mitsubishi Gas Chemical Company | 1 |
| 3 | Hideaki Matsuo | Sumitomo Electric Industries | 1 |
| 3 | Takashi Ishioka | Kabushiki Kaisha Toshiba | 1 |