Top Inventors at Koyo Engineering Co. All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Hiroshi Futami | 3 |
| 2 | Kenjiro Futami | 3 |
| 3 | Katsuhisa Kashiwazaki | 2 |
| #4 | Shuichi Saitoh | 2 |
| #5 | Hirotaka Yamashiro | 1 |
| #6 | Kazutoshi Kaibara | 1 |
| #7 | Katsumi Yamashita | 1 |
| #8 | Tetsu Tatsuma | 1 |
| #9 | Yasuhisa Maeda | 1 |
| #10 | Yoshihisa Ohko | 1 |
| #11 | Akira Fujishima | 1 |