Showing 1–4 of 4 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Kiyoto Takizawa | Nissei Plastic Industrial Co. | 3 |
| 2 | Kazuo Usui | Nissei Plastic Industrial Co. | 2 |
| 3 | Suinobu Kubota | Nissei Plastic Industrial Co. | 1 |
| 3 | Toshikatsu Terashima | Fuji Machine Mfg. Co. | 1 |