Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6647388 | Access control system, access control method, storage medium and program transmission apparatus | Michiharu Kudoh, Tomio Amano | 2003-11-11 |
| 6512835 | Data hiding and extraction methods | Shuichi Shimizu, Norishige Morimoto, Mei Kobayashi | 2003-01-28 |