Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7860255 | Content distribution server, key assignment method, content output apparatus, and key issuing center | Masao Nonaka, Yuichi Futa, Motoji Ohmori, Shigeru Yamada, Tetsuya Inoue | 2010-12-28 |
| 7401232 | Content playback apparatus method and program and key management apparatus and system | Takatoshi Ono, Shigeru Yamada, Hiroki Murakami, Tetsuya Inoue, Motoji Ohmori | 2008-07-15 |