Top Inventors at Yamada Manufacturing Co. 2021
| Rank | Name | Patents |
|---|---|---|
| 1 | Akifumi Ozeki | 6 |
| 2 | Taisuke Honma | 3 |
| 3 | Toru Sekiguchi | 3 |
| #4 | Masahiko Hoshino | 2 |
| #5 | Satoshi Watanabe | 2 |
| #6 | Toshihito Nagai | 2 |
| #7 | Yoshinori Shiroishi | 2 |
| #8 | Daisuke Kiryu | 1 |
| #9 | Junichi Miyajima | 1 |
| #10 | Kimihiko Arakawa | 1 |
| #11 | Naohiro Tagaya | 1 |
| #12 | Tomoya Ishikawa | 1 |
| #13 | Tomokazu Sato | 1 |
| #14 | Yasuhiro Kosugi | 1 |
| #15 | Yoshiharu Fuju | 1 |