Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6778969 | Method and apparatus for encrypting and recording received content information on a recording medium using both medium identification information and a cipher key for encryption | Mitsuaki Oshima, Yoshiho Gotoh, Shinichi Tanaka, Kenji Koishi, Yoshinari Takemura | 2004-08-17 |
| 6751176 | Optical disk with buffer area and recording and reproducing apparatus and methods | Yoshihiro Kanda, Mitsuteru Fujimoto | 2004-06-15 |
| 6737144 | Optical recording medium having dual information surfaces | Shin-ichi Tanaka, Yasuhiro Sugihara, Hiroshi Taniguchi, Michiyoshi Nagashima | 2004-05-18 |