Showing 1–7 of 7 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Katsutoshi Ishikawa | Mitsui Toatsu Chemicals, Incorporated | 10 |
| 2 | Shinichi Umino | Fuji Oozx | 8 |
| 3 | Mitsuru Kashiwagi | Hitachi | 5 |
| 3 | Atsushi Yuhara | Hitachi | 5 |
| #5 | Jousuke Matsuki | Hitachi | 1 |
| #5 | Josuke Matsuki | Hitachi | 1 |
| #5 | Seiji Yamoto | Usui Kokusai Sangyo Kaisha Limited | 1 |