Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4594267 | Process for producing cobalt-containing magnetic iron oxide powder | Ichiro Honma, Masaharu Hirai, Nobusuke Takumi | 1986-06-10 |
| 4551327 | Process for producing cobalt-and ferrous iron-containing ferromagnetic iron oxides | Ichiro Honma, Arata Koyama, Nobusuke Takumi | 1985-11-05 |
| 4486467 | Process for producing cobalt-containing magnetic iron oxide powder | Kazuo Nakata, Tsuneo Ishikawa, Ichiro Honma, Arata Koyama, Masaharu Hirai | 1984-12-04 |
| 4414245 | Process for producing cobalt containing ferromagnetic iron oxides | Kokichi Miyazawa, Kazuo Nakata, Tsuneo Ishikawa, Ichiro Honma, Arata Koyama | 1983-11-08 |