Issued Patents 2005
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6952486 | Digital watermark embedding method and apparatus, and digital watermark | Tomoo Yamakage, Hirofumi Muratani, Toru Kambayashi, Shinichiro Koto | 2005-10-04 |
| 6945455 | Method and apparatus for recording content containing watermark | Tadashi Kobayashi, Hideo Ando, Tomoo Yamakage | 2005-09-20 |
| 6847950 | Contents managing method and contents managing apparatus | Toru Kamibayashi, Masafumi Tamura, Taku Kato, Yasuhiro Ishibashi, Hideyuki Toma | 2005-01-25 |