Showing 1–4 of 4 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Yasutaka Tsuruga | Hitachi Construction Machinery Co. | 6 |
| 2 | Genroku Sugiyama | Hitachi Construction Machinery Co. | 2 |
| 3 | Kazuo Ishida | Mitsubishi Electric | 1 |
| 3 | Takeshi Aikawa | Kabushiki Kaisha Toshiba | 1 |