Showing 1–30 of 30 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Takeshi Majima | — | 7 |
| 2 | Tsuneo Matsui | Idemitsu Petrochemical Co. | 4 |
| 3 | Saburo Nishi | — | 3 |
| 3 | Taro Nanba | — | 3 |
| 3 | Susumu Kazama | Uchida Manufacturing Co. | 3 |
| #6 | Kazushi Goi | Sanjo Machine Works | 2 |
| #6 | Hisao Yoshii | Dainichi Kogyo Kabushiki Kaisha | 2 |
| #6 | Kouei Hasegawa | — | 2 |
| #6 | Sadaichi Kobayashi | — | 2 |
| #6 | Sadatsugu Shimizu | — | 2 |
| #6 | Hiroichi Koide | — | 2 |
| #6 | Seiichi Toyama | Green Life | 2 |
| #6 | Takahiro Sekine | Sanjo Machine Works | 2 |
| #6 | Teizo Kobayashi | — | 2 |
| #6 | Kazuhiko Tamaki | Nagata Seiki Co. | 2 |
| #6 | Naoichi Nishi | — | 2 |
| #6 | Yasusuke Murayama | Top Kogyo Co. | 2 |
| #6 | Mituharu Kobayashi | — | 2 |
| #6 | Nobuo Tsuchida | Uchida Manufacturing Co. | 2 |
| #6 | Tetsuei Uchida | Uchida Manufacturing Co. | 2 |
| #21 | Mitsuyuki Kaneko | — | 1 |
| #21 | Akio Hirasawa | Uchida Manufacturing Co. | 1 |
| #21 | Naohiko Soma | — | 1 |
| #21 | Masami Nashimoto | — | 1 |
| #21 | Hasegawa Makoto | — | 1 |
| #21 | Tsuyoshi Yoshihara | Nippon Kinzoku Co. | 1 |
| #21 | Ryojiro Asano | Unknown | 1 |
| #21 | Hasegawa Tozaburo | — | 1 |
| #21 | Michihiro HOSOJIMA | Ea Pharma Co. | 1 |
| #21 | Seiichi Nishikata | Nexus Company | 1 |