Top Inventors at Tone Co. All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Katsuhiro Fujimoto | 3 |
| 2 | Motohiro Hirao | 3 |
| 3 | Manabu Saito | 2 |
| #4 | Masao Watanabe | 2 |
| #5 | Tatsuo Hirai | 2 |
| #6 | Tatsuo Nakahata | 2 |
| #7 | Taro Watanabe | 2 |
| #8 | Toshihiko Kushida | 2 |
| #9 | Yukio Torigai | 2 |
| #10 | Hiroyuki Kawasaki | 1 |
| #11 | Nobuhisa Ikeda | 1 |
| #12 | Osamu Miyamoto | 1 |
| #13 | Yoshio Akiyama | 1 |
| #14 | Youichi Morisawa | 1 |
| #15 | Yuki Sugiura | 1 |
| #16 | Akira Takenouchi | 1 |