Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8003237 | Perpendicular magnetic recording disk and manufacturing method thereof | Yoshiaki Sonobe, Teiichiro Umezawa, Kong-Kyeom Kim | 2011-08-23 |
| 7169487 | Magnetic recording medium | Hisao Kawai, Teiichiro Umezawa, Hirotaka Tanaka | 2007-01-30 |
| 7081308 | Magnetic recording medium | Hisao Kawai, Teiichiro Umezawa, Hirotaka Tanaka | 2006-07-25 |