Showing 1–4 of 4 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Senichi Masuda | Ngk Spark Plug Co. | 1 |
| 1 | Katsuaki Shirakawa | — | 1 |
| 1 | Hideo Sugimura | Nippon Kayaku | 1 |
| 1 | Chotaro Yamaguchi | — | 1 |
4 patents · 4 inventors
Ranked #7,257 of 22,654 cities Top 35%
Showing 1–4 of 4 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Senichi Masuda | Ngk Spark Plug Co. | 1 |
| 1 | Katsuaki Shirakawa | — | 1 |
| 1 | Hideo Sugimura | Nippon Kayaku | 1 |
| 1 | Chotaro Yamaguchi | — | 1 |