Top Inventors at Kumagai Gumi Co. All Time
Showing 1–19 of 19 inventors
| Rank | Name | Patents |
|---|---|---|
| 1 | Shigekazu Horiya | 4 |
| 1 | Takayoshi Yokota | 4 |
| 3 | Kenjiroh Tanaka | 2 |
| #4 | Daijiro Tanabe | 1 |
| #4 | Hiroyuki Wada | 1 |
| #4 | Kenji Kita | 1 |
| #4 | Kozo Katayama | 1 |
| #4 | Kota Kodama | 1 |
| #4 | Koji Urano | 1 |
| #4 | Masanao Owaki | 1 |
| #4 | Nobuki Hashiguchi | 1 |
| #4 | Sadao Uno | 1 |
| #4 | Shigeo Kitahara | 1 |
| #4 | Takeshi Sugiyama | 1 |
| #4 | Takefumi Zaima | 1 |
| #4 | Toru Okazaki | 1 |
| #4 | Yasuhiro Miyazaki | 1 |
| #4 | Yasuhiro Yamashita | 1 |
| #4 | Joroku Sasahara | 1 |