Showing 1–5 of 5 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Izumi Ochiai | Hitachi | 3 |
| 2 | Yoshinari Nagoya | Hitachi | 1 |
| 2 | Keiichiro Koba | Mitsui Mining Company, Limited | 1 |
| 2 | Taisei Hosoda | Hitachi | 1 |
| 2 | Katuharu Uehara | Hitachi | 1 |
7 patents · 5 inventors
Ranked #3,004 of 15,417 cities Top 20%
Showing 1–5 of 5 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Izumi Ochiai | Hitachi | 3 |
| 2 | Yoshinari Nagoya | Hitachi | 1 |
| 2 | Keiichiro Koba | Mitsui Mining Company, Limited | 1 |
| 2 | Taisei Hosoda | Hitachi | 1 |
| 2 | Katuharu Uehara | Hitachi | 1 |