Showing 1–9 of 9 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Shinya Kagei | Mitsui Mining & Smelting Co. | 3 |
| 1 | Kentaro Ochi | Mitsui Mining & Smelting Co. | 3 |
| 3 | Yasuhiro Ochi | Mitsui Mining & Smelting Co. | 2 |
| 3 | Keisuke Miyanohara | Mitsui Mining & Smelting Co. | 2 |
| 3 | Naoki Kumada | Mitsui Mining & Smelting Co. | 2 |
| 3 | Yoshimi Hata | Mitsui Mining & Smelting Co. | 2 |
| #7 | Yoshiyuki Komatsu | Kao | 1 |
| #7 | Junichirou Tanaka | Daikin Industries | 1 |
| #7 | Munetoshi Yamaguchi | Mitsui Mining & Smelting Co. | 1 |