Top Inventors at Ishihara Sangyo Kaisha 2021
| Rank | Name | Patents |
|---|---|---|
| 1 | Chiaki Takeda | 2 |
| 2 | Hidetoku Iida | 1 |
| 3 | Hiroshi Yoshizawa | 1 |
| #4 | Mitsugu Iwasa | 1 |
| #5 | Mitsuo Sano | 1 |
| #6 | Satoru Tomaru | 1 |
| #7 | Taku Hamamoto | 1 |
| #8 | Takushi Matsui | 1 |
| #9 | Takashi Okada | 1 |
| Rank | Name | Patents |
|---|---|---|
| 1 | Chiaki Takeda | 2 |
| 2 | Hidetoku Iida | 1 |
| 3 | Hiroshi Yoshizawa | 1 |
| #4 | Mitsugu Iwasa | 1 |
| #5 | Mitsuo Sano | 1 |
| #6 | Satoru Tomaru | 1 |
| #7 | Taku Hamamoto | 1 |
| #8 | Takushi Matsui | 1 |
| #9 | Takashi Okada | 1 |