Showing 1–1 of 1 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Keiichi Hirata | Nippon Carbon Co. | 4 |
4 patents · 1 inventors
Ranked #73,472 of 111,555 cities Top 70%
Showing 1–1 of 1 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Keiichi Hirata | Nippon Carbon Co. | 4 |