Top Inventors at Hayakawa Rubber Co. All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Toshihiro Fujii | 7 |
| 2 | Hiroki Nii | 5 |
| 3 | Ban Tanaka | 4 |
| #4 | Hirofumi Kakimoto | 3 |
| #5 | Hideo Tanaka | 3 |
| #6 | Kosaku Yamada | 3 |
| #7 | Tetsuya Kimura | 3 |
| #8 | Yoshinobu Ishido | 3 |
| #9 | Hideo Kushida | 2 |
| #10 | Katsumi Sakamoto | 2 |
| #11 | Osamu Kiso | 2 |
| #12 | Ryouichi Kinoshita | 2 |
| #13 | Sadayoshi Nakatsukasa | 2 |
| #14 | Sekiji Yokota | 2 |
| #15 | Shuichi Koshio | 2 |
| #16 | Tadashi Hayakawa | 2 |
| #17 | Takashi Miya | 2 |
| #18 | Hajime Yamaji | 1 |
| #19 | Hiroyoshi Adachi | 1 |
| #20 | Hiroyoshi Hanada | 1 |
| #21 | Hiromi Murakami | 1 |
| #22 | Kazuya Fujita | 1 |
| #23 | Kazuto Urakami | 1 |
| #24 | Keiko Nishita | 1 |
| #25 | Kimio Mori | 1 |
| #26 | Kimio Yamaoka | 1 |
| #27 | Kohei Fujita | 1 |
| #28 | Masanori Igaki | 1 |
| #29 | Makoto Ikeda | 1 |
| #30 | Masamichi Kanno | 1 |
| #31 | Masahiro Natsume | 1 |
| #32 | Masaaki Noma | 1 |
| #33 | Shinya Shimada | 1 |
| #34 | Takeshi Kobayashi | 1 |
| #35 | Tsuguo Yamaoka | 1 |
| #36 | Yoshikazu Machida | 1 |
| #37 | Yosifumi Miyachi | 1 |
| #38 | Yuki Hayashi | 1 |
| #39 | Syuno Suto | 1 |
| #40 | Masao Etori | 1 |
| #41 | Kingo Manabe | 1 |
| #42 | Fujii Toshihiro | 1 |
| #43 | Setsuo Taninaka | 1 |