Showing 1–6 of 6 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Takashi Ohama | Brother Kogyo | 12 |
| 2 | Katsumi Inukai | Brother Kogyo | 7 |
| 3 | Isao Ito | — | 2 |
| 3 | Shinji Kumazawa | Ngk Spark Plug Co. | 2 |
| 3 | Yoshihiro Nakamura | Ngk Spark Plug Co. | 2 |
| #6 | Yuji Hashimoto | Toyota Industries | 1 |