Showing 1–4 of 4 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Kento KUMAGAI | Hitachi Construction Machinery Co. | 15 |
| 2 | Tadashi Kitaguchi | Fujisawa Pharmaceutical Co. | 9 |
| 2 | Shinjiro YAMAMOTO | Hitachi Construction Machinery Co. | 9 |
| #4 | Masayuki Fukushi | Hitachi Construction Machinery Co. | 1 |