Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5104750 | Magnetic recording medium | Osamu Kubo, Tutomu Nomura | 1992-04-14 |
| 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, Hirotaka Yokoyama | 1991-12-31 |
| 4837092 | Magnetic recording powder, method of manufacturing thereof and application thereof | Hirotaka Yokoyama, Tatsumi Maeda, Shunji Kurisu | 1989-06-06 |
| 4699771 | Magnetic recording powder, method of manufacturing thereof and application thereof | Hirotaka Yokoyama, 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, Hirotaka Yokoyama | 1987-01-13 |
| 4606971 | Magnetic recording medium | Osamu Kubo, Masahiro Fukasawa, Tatsumi Maeda, Tutomu Nomura | 1986-08-19 |
| 4582623 | Barium ferrite magnetic powder and recording medium employing the same | Osamu Kubo, Tutomu Nomura | 1986-04-15 |
| 4578313 | Powder for magnetic recording media and process for manufacturing the same | Takeo Ito, Hajime Takeuchi, Minoru Hashimoto, Tatsumi Maeda, Masashi Awa | 1986-03-25 |
| 4569775 | Method for manufacturing a magnetic powder for high density magnetic recording | Osamu Kubo, Tutomu Nomura, Koichiro Inomata | 1986-02-11 |
| 4493874 | Production of a magnetic powder having a high dispersibility | Osamu Kubo, Tutomu Nomura, Tatsumi Maeda | 1985-01-15 |
| 4425401 | Magnetic recording media | Hirotaka Yokoyama, Moriyasu Wada, Toshihiko Oguchi, Akio Ishizawa, Yoshiyasu Koike | 1984-01-10 |
| 4407721 | Process for manufacturing powder for magnetic recording medium | Yoshiyasu Koike, Osamu Kubo, Masanobu Uwaha | 1983-10-04 |
| 4341648 | Method for manufacturing magnetic powder for high density magnetic recording | Osamu Kubo, Tutomu Nomura, Koichiro Inomata | 1982-07-27 |
| 4321155 | Piezoelectric oxide material | Youhachi Yamashita, Katsunori Yokoyama, Seiichi Yoshida | 1982-03-23 |