Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5494749 | Magnetic powder for magnetic recording and magnetic recording medium containing the same | Osamu Kubo, Tatsumi Maeda, Shunji Kurisu, Etsuji Ogawa | 1996-02-27 |
| 5378547 | Magnetic powder for magnetic recording and magnetic recording medium containing the same | Osamu Kubo, Tatsumi Maeda, Shunji Kurisu, Etsuji Ogawa | 1995-01-03 |
| 5104750 | Magnetic recording medium | Osamu Kubo, Tadashi Ido | 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, Tadashi Ido, Hirotaka Yokoyama | 1991-12-31 |
| 4636433 | Magnetic powders for magnetic recording media and magnetic recording media employing said magnetic powder therein | Osamu Kubo, Tadashi Ido, Hirotaka Yokoyama | 1987-01-13 |
| 4606971 | Magnetic recording medium | Tadashi Ido, Osamu Kubo, Masahiro Fukasawa, Tatsumi Maeda | 1986-08-19 |
| 4582623 | Barium ferrite magnetic powder and recording medium employing the same | Osamu Kubo, Tadashi Ido | 1986-04-15 |
| 4569775 | Method for manufacturing a magnetic powder for high density magnetic recording | Osamu Kubo, Tadashi Ido, Koichiro Inomata | 1986-02-11 |
| 4493874 | Production of a magnetic powder having a high dispersibility | Osamu Kubo, Tadashi Ido, Tatsumi Maeda | 1985-01-15 |
| 4341648 | Method for manufacturing magnetic powder for high density magnetic recording | Osamu Kubo, Tadashi Ido, Koichiro Inomata | 1982-07-27 |