Top Inventors at Hirayama Setsubi Kabushiki Kaisha All Time
Showing 1–9 of 9 inventors
| Rank | Name | Patents |
|---|---|---|
| 1 | Shoji Hirayama | 4 |
| 2 | Kensuke Hirayama | 2 |
| 3 | Hitoshi Ura | 1 |
| 3 | Masao Kimura | 1 |
| 3 | Misao Osawa | 1 |
| 3 | Nobuhiko Hirota | 1 |
| 3 | Tsutomu Fujita | 1 |
| 3 | Yotsuo Mizunuma | 1 |
| 3 | Akira Sueda | 1 |