Showing 1–9 of 9 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Kazuo Usui | Nissei Plastic Industrial Co. | 4 |
| 2 | Kiyoto Takizawa | Nissei Plastic Industrial Co. | 3 |
| 3 | Tsuyoshi Tomiyama | Kotobuki Seiyaku Co. | 2 |
| #4 | Tsukasa Yoda | Nissei Plastic Industrial Co. | 1 |
| #4 | Teruo Miyazawa | Fuji Chemical Industry Co. | 1 |
| #4 | Yoshihide Shimada | Takeuchi Mfg., Co. | 1 |
| #4 | Akira Tomiyama | Kotobuki Seiyaku Co. | 1 |
| #4 | Takashi Yanagisawa | Kotobuki Seiyaku Co. | 1 |
| #4 | Yoshimori Kondo | Hitachi | 1 |