Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5609789 | Cobalt-containing magnetic iron oxide and process for producing the same | Kiyoshi Asano, Arata Koyama, Shigeru Takatori, Kouichi Tamura, Tokuo Suita | 1997-03-11 |
| 5585032 | Ferromagnetic fine powder for magnetic recording | Kazuo Nakata, Masaharu Hirai, Saburo Kato | 1996-12-17 |
| 5246609 | Process for preparing ferromagnetic fine particles for magnetic recording | Kazuo Nakata, Masaharu Hirai, Saburo Kato | 1993-09-21 |
| 4594267 | Process for producing cobalt-containing magnetic iron oxide powder | Ichiro Honma, Masaharu Hirai, Masatoshi Amano | 1986-06-10 |
| 4551327 | Process for producing cobalt-and ferrous iron-containing ferromagnetic iron oxides | Ichiro Honma, Arata Koyama, Masatoshi Amano | 1985-11-05 |