Showing 1–7 of 7 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Nobuyuki Hotta | Ngk Spark Plug Co. | 2 |
| 1 | Masashi Kato | Toyota | 2 |
| 3 | Osamu Asami | Toyota Central R&D Labs | 1 |
| 3 | Takayoshi Atsumi | Ngk Spark Plug Co. | 1 |
| 3 | Hiroshi Niizuma | Toagosei Co. | 1 |
| 3 | Fumikazu Sato | Brother Kogyo | 1 |
| 3 | Masayuki Segawa | Ngk Spark Plug Co. | 1 |