Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6775391 | Associated information adding apparatus and method associated information detecting apparatus and method and illegal use preventing system | Kazuhisa Hosaka, Yoichi Yagasaki | 2004-08-10 |
| 6731774 | Associated information adding apparatus and method, and associated information detecting apparatus and method | Kazuhisa Hosaka, Yoichi Yagasaki | 2004-05-04 |