Showing 1–7 of 7 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Takayoshi Atsumi | Ngk Spark Plug Co. | 3 |
| 2 | Masayuki Segawa | Ngk Spark Plug Co. | 2 |
| 3 | Fumikazu Sato | Brother Kogyo | 1 |
| 3 | Yukihiko Horiba | Toyoda Gosei Co. | 1 |
| 3 | Tetsuya Hattori | Sumitomo Electric Industries | 1 |
| 3 | Masashi Kato | Toyota | 1 |
| 3 | Nobuyuki Hotta | Ngk Spark Plug Co. | 1 |