Top Inventors at Oht All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Shuji Yamaoka | 22 |
| 2 | Shogo Ishioka | 18 |
| 3 | Tatuhisa Fujii | 4 |
| #4 | Yuji Odan | 4 |
| #5 | Akira Nurioka | 3 |
| #6 | Hiroshi Hamori | 2 |
| #7 | Koji Okano | 2 |
| #8 | Mishio Hayashi | 2 |
| #9 | Rihito Kuroda | 2 |
| #10 | Shigetoshi Sugawa | 2 |
| #11 | Tetsuya Goto | 2 |
| #12 | Toshiro Yasuda | 2 |
| #13 | Hideo Onishi | 1 |
| #14 | Kazutoshi Kamibayashi | 1 |
| #15 | Kazuhiro Monden | 1 |
| #16 | Masataka Nakamura | 1 |
| #17 | Mikiya Kasai | 1 |
| #18 | Naoya Takada | 1 |
| #19 | Shinichi Murakami | 1 |
| #20 | Tatsuhisa Fujii | 1 |
| #21 | Takayuki Genba | 1 |
| #22 | Yasushige Yoshioka | 1 |
| #23 | Yoshikazu Taniguchi | 1 |
| #24 | Yuichiro Aomori | 1 |