Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6692809 | Optical recording medium | Makoto Matsukawa, Seiro Oshima | 2004-02-17 |
| 6687213 | Optical recording medium having pre-formed land-prepits and method for producing same | Masahiro Kato, Eiji Muramatsu, Kunihiko Horikawa, Shoji Taniguchi, Atsushi Yamaguchi | 2004-02-03 |