Showing 1–7 of 7 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Nao Kumai | Mitsubishi Pencil Company, Limited | 2 |
| 1 | Shoichi Saito | Olympus Optical Co. | 2 |
| 3 | Ryosuke Matsushima | Mitsubishi Pencil Company, Limited | 1 |
| 3 | Hiroaki Koyama | Mitsubishi Pencil Company, Limited | 1 |
| 3 | Satoru Banzai | Mitsubishi Pencil Company, Limited | 1 |
| 3 | Jun Nakada | Mitsubishi Pencil Company, Limited | 1 |
| 3 | Satoru Sawada | Canon | 1 |