Top Inventors at Purpose Co. All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Jun Aiso | 4 |
| 2 | Katsumi Naitoh | 4 |
| 3 | Toshiaki Aoki | 4 |
| #4 | Katumi Naitoh | 3 |
| #5 | Kazuhiko Nakagawa | 3 |
| #6 | Tetsuya Oishi | 3 |
| #7 | Yasutaka Hatada | 3 |
| #8 | Hidetada Takai | 2 |
| #9 | Ibuki Kinouchi | 2 |
| #10 | Kazushi Iwama | 2 |
| #11 | Kentaro Suzuki | 2 |
| #12 | Kyohei Matsushita | 2 |
| #13 | Mituharu Satou | 2 |
| #14 | Setuo Watanabe | 2 |
| #15 | Setsuo Watanabe | 2 |
| #16 | Toshimi Murata | 2 |
| #17 | Tsuyoshi Sei | 2 |
| #18 | Yasunori Katoh | 2 |
| #19 | Akito Watanabe | 2 |
| #20 | Akihito Yamashita | 2 |
| #21 | Hiroshi Fushimi | 1 |
| #22 | Hidenori Kiuchi | 1 |
| #23 | Kazutoshi Sano | 1 |
| #24 | Kenji Kato | 1 |
| #25 | Mitsutaka Inaba | 1 |
| #26 | Mituru Sano | 1 |
| #27 | Naoki Ishii | 1 |
| #28 | Takeharu Totsuka | 1 |
| #29 | Toshinobu Muku | 1 |
| #30 | Toshiya Tatsumi | 1 |
| #31 | Tsutomu Miyahara | 1 |
| #32 | Yoshiaki Sano | 1 |
| #33 | Yuto Kubota | 1 |
| #34 | Yuichi Mochizuki | 1 |