Showing 1–21 of 21 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Masashi Kato | Toyota | 90 |
| 2 | Fumikazu Sato | Brother Kogyo | 78 |
| 3 | Naoki Otsuka | Brother Kogyo | 35 |
| #4 | Nobuyuki Hotta | Ngk Spark Plug Co. | 33 |
| #5 | Akio Takami | Ngk Spark Plug Co. | 29 |
| #6 | Masataka Maeda | Brother Kogyo | 23 |
| #7 | Tetsuya Hattori | Sumitomo Electric Industries | 22 |
| #8 | Hisashi Sasaki | Ngk Spark Plug Co. | 20 |
| #9 | Takayoshi Atsumi | Ngk Spark Plug Co. | 16 |
| #10 | Kazuhito Misumi | Brother Kogyo | 10 |
| #10 | Go Hanzawa | Ngk Spark Plug Co. | 10 |
| #12 | Yukio Mitsukuchi | Yamazaki Mazak | 9 |
| #12 | Hiroshi Niizuma | Toagosei Co. | 9 |
| #14 | Osamu Asami | Toyota Central R&D Labs | 8 |
| #14 | Yasuyuki Furuta | Ngk Insulators | 8 |
| #16 | Masataka Taguchi | Ngk Spark Plug Co. | 7 |
| #17 | Yukihiko Horiba | Toyoda Gosei Co. | 6 |
| #18 | Masayuki Segawa | Ngk Spark Plug Co. | 5 |
| #19 | Shinkichi Kashihara | Sumitomo Riko Company Limited | 4 |
| #19 | Kiyokazu Kainuma | Yamazaki Mazak | 4 |
| #21 | Jun-ichi Tokumoto | Ngk Spark Plug Co. | 3 |