Showing 1–9 of 9 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Fumikazu Sato | Brother Kogyo | 12 |
| 2 | Masashi Kato | Toyota | 4 |
| 3 | Tetsuya Hattori | Sumitomo Electric Industries | 2 |
| 3 | Hisashi Sasaki | Ngk Spark Plug Co. | 2 |
| 3 | Takayoshi Atsumi | Ngk Spark Plug Co. | 2 |
| #6 | Nobuyuki Hotta | Ngk Spark Plug Co. | 1 |
| #6 | Masataka Taguchi | Ngk Spark Plug Co. | 1 |
| #6 | Naoki Otsuka | Brother Kogyo | 1 |
| #6 | Masataka Maeda | Brother Kogyo | 1 |