Top Inventors at Toa Grout Kogyo Co. All Time
Showing 1–10 of 10 inventors
| Rank | Name | Patents |
|---|---|---|
| 1 | Hisashi Kitajima | 4 |
| 2 | Sakae Sano | 3 |
| 3 | Hiroshi Iimori | 2 |
| 3 | Hidehiro Noda | 2 |
| 3 | Tadashi Nishio | 2 |
| #6 | Kenneth Scott | 1 |
| #6 | Shinkichi Ohoka | 1 |
| #6 | Sinkiti Ooka | 1 |
| #6 | Takayuki Kawafuji | 1 |
| #6 | Yukio Suzuki | 1 |