Showing 1–9 of 9 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Manabu Wakamatsu | Tohoku Ricoh Co. | 6 |
| 1 | Yusuke Tanno | Tohoku Ricoh Co. | 6 |
| 3 | Eiji Ohkawa | Tohoku Ricoh Co. | 5 |
| #4 | Masaaki Ishizaki | Keihin | 4 |
| #5 | Taketoshi Hirama | Walbro | 2 |
| #6 | Takeshi Hirama | Keihin | 1 |
| #6 | Takuya Oouchi | Keihin | 1 |
| #6 | Takuya Ohuchi | Keihin | 1 |
| #6 | Hiroaki Mitsugashira | — | 1 |