Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6804454 | Video signal transmission method, superimposed information extraction method, video signal output device, video signal recording device, and video signal recording medium | Akira Ogino | 2004-10-12 |
| 6782191 | Additional information superposing method, information signal copy control method, information signal output device and information signal recording device | Akira Ogino, Hisayoshi Moriwaki | 2004-08-24 |
| 6728883 | Additional information superimposing apparatus, additional information superimposing method, additional information detecting apparatus, and additional information detecting method | Takashi Kohashi | 2004-04-27 |