Top Inventors at Oval All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Hirokazu Kitami | 14 |
| 2 | Yuichi Nakao | 12 |
| 3 | Hideki Shimada | 8 |
| #4 | Norio Sukemura | 6 |
| #5 | Seiji Kobayashi | 6 |
| #6 | Naoki Matsubara | 5 |
| #7 | Shingo Gomi | 5 |
| #8 | Hiroyuki Kabaya | 3 |
| #9 | Katsuichi Uchida | 3 |
| #10 | Kenichi Matsuoka | 3 |
| #11 | Kimihiro Ichinose | 3 |
| #12 | Hajime Iida | 2 |
| #13 | Jun Tanimoto | 2 |
| #14 | Kazuhide KOBAYASHI | 2 |
| #15 | Kenichi Takai | 2 |
| #16 | Kenji WASHIO | 2 |
| #17 | Kohji Takahashi | 2 |
| #18 | Noriaki Nakayama | 2 |
| #19 | Osamu Futagawa | 2 |
| #20 | Seigo Ono | 2 |
| #21 | Shunji Saitoh | 2 |
| #22 | Takashi Endo | 2 |
| #23 | Tatsumi Kameyama | 2 |
| #24 | Takeshi Wakamatsu | 2 |
| #25 | Yasushi Ito | 2 |
| #26 | Yasuichi Shiraishi | 2 |
| #27 | Yutaka Ogawa | 2 |
| #28 | Hiraku Kawaoto | 1 |
| #29 | Hirokazu Kuge | 1 |
| #30 | Hidemi Seki | 1 |
| #31 | Koji Atsumi | 1 |
| #32 | Masao Misumi | 1 |
| #33 | Masahito Yoshimoto | 1 |
| #34 | Minoru Oomura | 1 |
| #35 | Satoru Nihei | 1 |
| #36 | Shinsuke Imai | 1 |
| #37 | Shinji Oda | 1 |
| #38 | Takashi Hirose | 1 |
| #39 | Takeshi Motomiya | 1 |
| #40 | Tetsushi Kitano | 1 |
| #41 | Toshihiro Abe | 1 |
| #42 | Toshiyuki Satoh | 1 |
| #43 | Yoshifumi Endo | 1 |
| #44 | Yoshimine Tanabu | 1 |