Showing 1–4 of 4 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Shunsuke Sakai | Ibiden Co. | 2 |
| 2 | Mitsuhiro Kawabata | Mitsubishi Pencil Company, Limited | 1 |
| 2 | Kiyoshi Fujisawa | Mitsubishi Pencil Company, Limited | 1 |
| 2 | Kyoichiro Nakamura | Mitsubishi Pencil Company, Limited | 1 |