Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE38587 | Magnetic recording medium | Isatake Kaitsu, Iwao Okamoto | 2004-09-14 |
| 6740383 | Magnetic recording medium possessing a ratio of Hc(perpendicular) to Hc(horizontal) that is not more than 0.22 and magnetic recording disk device | Kenji Sato, Yuki Yoshida, Iwao Okamoto, Yasuji Ikeda, Kiyoshi Yamaguchi | 2004-05-25 |