Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8332640 | Storage apparatus, method for validating encrypted content and terminal apparatus | Yukihide Inagaki, Tatsuya Hirai | 2012-12-11 |
| 7958370 | System and device for managing control data | Tatsuya Hirai | 2011-06-07 |
| 7953098 | Method for limiting utilizing terminal of contents, and storage device and system for method | Tatsuya Hirai | 2011-05-31 |
| 7937766 | Method and system for preventing simultaneous use of contents in different formats derived from the same content at a plurality of places | Yukihide Inagaki, Shuichi Miyazaki | 2011-05-03 |