Showing 1–6 of 6 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Yoshinobu Kobayashi | Sumitomo Electric Industries | 3 |
| 1 | Toshiaki Okanishi | Kanzaki Kokyukoki Mfg. Co. | 3 |
| 3 | Mitsuo Sonoda | Hitachi Construction Machinery Co. | 1 |
| 3 | Daisuke Manabe | Tokyo Rope Mfg. Co. | 1 |
| 3 | Junichi Oizumi | Hitachi | 1 |
| 3 | Tadakatsu Nakajima | Hitachi | 1 |