Showing 1–12 of 12 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Ken Yoshioka | Hitachi | 9 |
| 2 | Saburo Kanai | Hitachi | 5 |
| 3 | Ikuo Yoshida | Hitachi | 4 |
| #4 | Saburou Kanai | Hitachi | 3 |
| #5 | Nobuhiko Nakayama | Idemitsu Petrochemical Co. | 2 |
| #5 | Takeshi Ikemoto | Kanebo, Limited | 2 |
| #7 | Takazumi Ishizu | Hitachi | 1 |
| #7 | Yoshifumi Ogawa | Hitachi | 1 |
| #7 | Yoshiyuki Nakamoto | Tosoh | 1 |
| #7 | Yutaka Ohmoto | Hitachi | 1 |
| #7 | Takashi Minamigi | Toyo Kohan Co. | 1 |
| #7 | Zenji Kawasaki | Nippon Steel Welding Products And Engineering Co. | 1 |