Top Inventors at Hirakawa Hewtech All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Mitsuo Iwasaki | 3 |
| 2 | Hiroshi Wakabayashi | 2 |
| 3 | Mitsunori Satou | 2 |
| #4 | Shigeru Matsumura | 2 |
| #5 | Shigeru Murayama | 2 |
| #6 | Yasuo Furukawa | 2 |
| #7 | Hiroyuki Kimura | 1 |
| #8 | Hisao Saito | 1 |
| #9 | Hiroyuki Tanaka | 1 |
| #10 | Hiroshi Ukaji | 1 |
| #11 | Katsuo Tanaka | 1 |
| #12 | Mitsuo Nanjo | 1 |
| #13 | Mitsuo Nanjyo | 1 |
| #14 | Takao Ishido | 1 |
| #15 | Takaaki Kusama | 1 |
| #16 | Tetsuo Yamaguchi | 1 |