Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7672474 | Electronic watermark embedding device, electronic watermark detection device, method thereof, and program | Takao Nakamura, Atushi Katayama | 2010-03-02 |
| 7489796 | Electronic watermark embedding device, electronic watermark detection device, method thereof, and program | Takao Nakamura, Atushi Katayama | 2009-02-10 |