Showing 1–5 of 5 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Hiroyuki Nakasuka | Kai R&D Center Co. | 1 |
| 1 | Kengo Hashimoto | Kai R&D Center Co. | 1 |
| 1 | Seiya Yamamoto | Feather Safety Razor Co. | 1 |
| 1 | Akira Abo | Kai R&D Center Co. | 1 |
| 1 | Daisuke Haba | Kai R&D Center Co. | 1 |