Showing 1–7 of 7 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Shinya Kagei | Mitsui Mining & Smelting Co. | 4 |
| 1 | Yoshimi Hata | Mitsui Mining & Smelting Co. | 4 |
| 3 | Hitohiko Ide | Mitsui Mining & Smelting Co. | 2 |
| 3 | Tetsuya Mitsumoto | Mitsui Mining & Smelting Co. | 2 |
| #5 | Takayoshi HOSHINO | Aohata | 1 |
| #5 | Natsumi Ito | Mitsui Mining & Smelting Co. | 1 |
| #5 | Keisuke Miyanohara | Mitsui Mining & Smelting Co. | 1 |