Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8448217 | Computer program, method, and system for access control | Takahisa Hatakeyama | 2013-05-21 |
| 8413211 | Access control policy compliance check process | Takahisa Hatakeyama, Takayuki Hasebe, Takeaki Terada | 2013-04-02 |
| 7549172 | Data processing apparatus for digital copyrights management | Takahisa Hatakeyama, Keishiro Tanaka, Masakazu Yura, Teruyoshi Nagaoka | 2009-06-16 |