Top Inventors at Ozawa Concrete Industry All Time
Showing 1–9 of 9 inventors
| Rank | Name | Patents |
|---|---|---|
| 1 | Seiichi Ozawa | 4 |
| 2 | Kanjiro Ishizaki | 2 |
| 2 | Osamu Suzuki | 2 |
| #4 | Seiji Kaneko | 1 |
| #4 | Shizuko Kushida | 1 |
| #4 | Takafumi Naito | 1 |
| #4 | Takefumi Shindo | 1 |
| #4 | Yasunori Matsuoka | 1 |
| #4 | Takashi Tsubahara | 1 |