Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5043210 | Magnetic recording media having two magnetic layers; the first for recording a baseboard signal and the second for recording a superimposed surface and signal | Yoshisuke Yamakawa, Yoshihiro Honjo, Hiroshi Kawahara | 1991-08-27 |
| 4689263 | Magnetic recording medium | Hirokazu Kambe, Kazuhiro Kuroda | 1987-08-25 |
| 4423114 | Magnetic powder for magnetic recording medium | Hiroto Saguchi, Keitaro Sakai | 1983-12-27 |
| 4420537 | Magnetic recording medium having cobalt adsorbed iron oxide layer | Hiroto Saguchi, Kenji Hirabayashi | 1983-12-13 |
| 4394420 | Magnetic recording medium | Kiminori Tamai | 1983-07-19 |
| 4388369 | Magnetic recording medium | Kiminori Tamai | 1983-06-14 |
| 4379803 | Magnetic recording medium | Kiminori Tamai | 1983-04-12 |
| 4285825 | Method of producing magnetic coating material for magnetic recording media | Yukihiro Isobe, Kenji Hirabayashi | 1981-08-25 |