Top Inventors at Dowa Metals & Mining Co. All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Tetsuo Fujita | 8 |
| 2 | Hironobu Mikami | 5 |
| 3 | Masayoshi Matsumoto | 5 |
| #4 | Masami Oouchi | 5 |
| #5 | Yusuke Sato | 5 |
| #6 | Mitsuo Abumiya | 4 |
| #7 | Minoru Kawasaki | 3 |
| #8 | Yuzuru Nakamura | 3 |
| #9 | Hiroshi Inoue | 2 |
| #10 | Katsunori Yamaguchi | 2 |
| #11 | Koji Yamada | 2 |
| #12 | Masahiko Ogino | 2 |
| #13 | Nobuyasu Ezawa | 2 |
| #14 | Nobuaki Kita | 2 |
| #15 | Ryoichi Taguchi | 2 |
| #16 | Haruhiro Otani | 1 |
| #17 | Hisashi Kubo | 1 |
| #18 | Hiromitsu Yatsuhashi | 1 |
| #19 | Kenichi Inoue | 1 |
| #20 | Keiko Ishizaki | 1 |
| #21 | Kozo Shinoda | 1 |
| #22 | Mitsuo Abuyima | 1 |
| #23 | Shigeru Suzuki | 1 |
| #24 | Takashi Nakamura | 1 |
| #25 | Tetsuya Ueda | 1 |
| #26 | Yoshihiro Honma | 1 |
| #27 | Akira Tsukada | 1 |