Top Inventors at Irie Koken Co. All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Yuzo Hayashi | 5 |
| 2 | Norikimi Irie | 4 |
| 3 | Masaharu Nakagawa | 3 |
| #4 | Manabu Yabe | 3 |
| #5 | Toshio Sawa | 2 |
| #6 | Hiroshi Minamoto | 1 |
| #7 | Shinya Yamaguchi | 1 |
| #8 | Tatsuo Saito | 1 |
| #9 | Toshiro Katagiri | 1 |
| #10 | Yoshihiro Ishizaki | 1 |
| #11 | Yoshinobu Nakamura | 1 |
| #12 | Yuuzou Hayashi | 1 |
| #13 | Yusuke Suga | 1 |