Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6770389 | Perpendicular magnetic recording medium and magnetic recording apparatus | Masaaki Futamoto, Yoshiyuki Hirayama, Yukio Honda | 2004-08-03 |
| 6562453 | Perpendicular magnetic recording medium and magnetic recording apparatus | Masaaki Futamoto, Yoshiyuki Hirayama, Yukio Honda | 2003-05-13 |
| 6370107 | Recording medium and recording device | Sumio Hosaka, Hajime Koyanagi, Kenchi Ito, Kimitoshi Etoh | 2002-04-09 |
| 6246652 | Device using sensor for small rotation angle | Sumio Hosaka, Hajime Koyanagi, Kimitoshi Etoh | 2001-06-12 |
| 5615192 | Information recording and reproducing method and apparatus | Sumio Hosaka, Youji Maruyama, Toshimichi Shintani, Takeshi Shimano | 1997-03-25 |