Showing 1–5 of 5 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Yukuharu Seki | Mitsubishi Mining | 3 |
| 2 | Hirohisa Senzaki | Mitsui Kinzoku Kogyo | 2 |
| 2 | Yoshio Sohama | Mitsui Kinzoku Kogyo | 2 |
| 2 | Kanetaro Sannohe | Mitsui Kinzoku Kogyo | 2 |
| #5 | Toyohide Uemura | Mitsui Mining & Smelting Co. | 1 |