Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5494732 | Magnetic recording medium and a method for producing the same wherein the medium has two magnetic layers differing in degree of orientation | Takeo Ito | 1996-02-27 |
| 5384182 | Magnetic recording medium and a method for producing the same wherein the medium has two magnetic layers differing in degree of orientation | Takeo Ito | 1995-01-24 |
| 5077146 | Magnetic recording medium containing a substituted hexagonal ferrite magnetic powder which includes Zr or Hf and which has a temperature coefficient of coercivity not more than 3.5 oersteds/.degree.C. | Osamu Kubo, Tutomu Nomura, Tadashi Ido | 1991-12-31 |
| 4837092 | Magnetic recording powder, method of manufacturing thereof and application thereof | Tadashi Ido, Tatsumi Maeda, Shunji Kurisu | 1989-06-06 |
| 4699771 | Magnetic recording powder, method of manufacturing thereof and application thereof | Tadashi Ido, Tatsumi Maeda, Shunji Kurisu | 1987-10-13 |
| 4636433 | Magnetic powders for magnetic recording media and magnetic recording media employing said magnetic powder therein | Osamu Kubo, Tutomu Nomura, Tadashi Ido | 1987-01-13 |
| 4447467 | Method and apparatus for perpendicular magnetic recording medium | Toshihiko Oguchi, Hirohisa Kato | 1984-05-08 |
| 4425401 | Magnetic recording media | Tadashi Ido, Moriyasu Wada, Toshihiko Oguchi, Akio Ishizawa, Yoshiyasu Koike | 1984-01-10 |