Top Inventors at Hiraoka Kogyo Co. All Time
Showing 1–10 of 10 inventors
| Rank | Name | Patents |
|---|---|---|
| 1 | Hideo Kitagawa | 1 |
| 1 | Hiroshi Nasu | 1 |
| 1 | Kenichi Hasegawa | 1 |
| 1 | Koichiro Ohkawa | 1 |
| 1 | Minoru Fukada | 1 |
| 1 | Shunji Hiranuma | 1 |
| 1 | Toshihiko Mizuno | 1 |
| 1 | Yoshio Okugawa | 1 |
| 1 | Zen Sakaguchi | 1 |
| 1 | Itaru Nagoshi | 1 |