Showing 1–7 of 7 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Yoshihisa Suda | Mitsubishi Pencil Company, Limited | 2 |
| 2 | Takao Koyama | Mitsubishi Pencil Company, Limited | 1 |
| 2 | Yoshiomi Konose | Mitsubishi Pencil Company, Limited | 1 |
| 2 | Isao Tanno | Yoshino Kogyosho Co. | 1 |
| 2 | Yasuyuki Iwase | Mitsubishi Pencil Company, Limited | 1 |
| 2 | Shigeo Tomiyama | Hitachi | 1 |
| 2 | Shoichi Saito | Olympus Optical Co. | 1 |