Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5766763 | Hexagonal system ferrite powder for a high density magnetic recording medium | Shunji Kurisu, Osamu Kubo, Etsuji Ogawa | 1998-06-16 |
| 5698336 | Magnetic recording medium | Minoru Hashimoto, Masahiro Fukasawa, Kazutaka Akiyama, Tsutomu Tanaka | 1997-12-16 |
| 5686137 | Method of providing hexagonal ferrite magnetic powder with enhanced coercive force stability | Etsuji Ogawa, Osamu Kubo, Shunji Kurisu | 1997-11-11 |
| 5576114 | High density magnetic recording medium containing hexagonal system ferrite powder | Shunji Kurisu, Osamu Kubo, Etsuji Ogawa | 1996-11-19 |
| 5494749 | Magnetic powder for magnetic recording and magnetic recording medium containing the same | Osamu Kubo, Tutomu Nomura, Shunji Kurisu, Etsuji Ogawa | 1996-02-27 |
| 5378547 | Magnetic powder for magnetic recording and magnetic recording medium containing the same | Osamu Kubo, Tutomu Nomura, Shunji Kurisu, Etsuji Ogawa | 1995-01-03 |
| 5219500 | Silicon nitride sintered body and process for preparation thereof | Makoto Yoshida, Masahiro Sato, Kazunori Koga, Kazumi Osamura, Shoji Kousaka +2 more | 1993-06-15 |
| 5132072 | Molding method of ceramic body | Osamu Fukuoka, Toshiyuki Akamatsu, Kazuto Matsukami | 1992-07-21 |
| 4920085 | Silicon nitride sintered body and process for preparation thereof | Makoto Yoshida, Masahiro Sato, Kazunori Koga, Kazumi Osamura, Shoji Kousaka +2 more | 1990-04-24 |
| 4837092 | Magnetic recording powder, method of manufacturing thereof and application thereof | Hirotaka Yokoyama, Tadashi Ido, Shunji Kurisu | 1989-06-06 |
| 4714654 | Magnetic recording medium | Takeo Ito, Hajime Takeuchi, Minoru Hashimoto | 1987-12-22 |
| 4699771 | Magnetic recording powder, method of manufacturing thereof and application thereof | Hirotaka Yokoyama, Tadashi Ido, Shunji Kurisu | 1987-10-13 |
| 4606971 | Magnetic recording medium | Tadashi Ido, Osamu Kubo, Masahiro Fukasawa, Tutomu Nomura | 1986-08-19 |
| 4578313 | Powder for magnetic recording media and process for manufacturing the same | Takeo Ito, Tadashi Ido, Hajime Takeuchi, Minoru Hashimoto, Masashi Awa | 1986-03-25 |
| 4493874 | Production of a magnetic powder having a high dispersibility | Osamu Kubo, Tadashi Ido, Tutomu Nomura | 1985-01-15 |