Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7505584 | Contents management method, contents management apparatus, and recording medium | Taku Kato, Hideyuki Toma, Makoto Tatebayashi, Shunji Harada, Hisashi Yamada | 2009-03-17 |
| 7392225 | Revocation information updating method, revocation information updating apparatus and storage medium | Shunji Harada, Makoto Tatebayashi, Masayuki Kozuka, Teruto Hirota, Masafumi Tamura | 2008-06-24 |
| 7181008 | Contents management method, content management apparatus, and recording medium | Taku Kato, Hideyuki Toma, Makoto Tatebayashi, Shunji Harada, Hisashi Yamada | 2007-02-20 |
| 6850914 | Revocation information updating method, revocation informaton updating apparatus and storage medium | Shunji Harada, Makoto Tatebayashi, Masayuki Kozuka, Teruto Hirota, Masafumi Tamura | 2005-02-01 |
| 6847950 | Contents managing method and contents managing apparatus | Masafumi Tamura, Taku Kato, Yasuhiro Ishibashi, Hisashi Yamada, Hideyuki Toma | 2005-01-25 |
| 6654820 | System capable of recording a content onto a recording medium which does not have a medium ID | Yasuhiro Ishibashi, Masafumi Tamura | 2003-11-25 |
| 6581160 | Revocation information updating method, revocation information updating apparatus and storage medium | Shunji Harada, Makoto Tatebayashi, Masayuki Kozuka, Teruto Hirota, Masafumi Tamura | 2003-06-17 |