Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8667302 | Signature generating device and method, signature verifying device and method, and computer product | Takashi Yoshioka, Masahiko Takenaka, Fumitsugu Matsuo | 2014-03-04 |
| 8566597 | Digital signature program, digital signature apparatus, and digital signature method | Masahiko Takenaka, Takashi Yoshioka, Fumitsugu Matsuo | 2013-10-22 |
| 8549306 | Image managing method and image managing system | Takashi Yoshioka, Fumitsugu Matsuo, Kiyohide Yamashita | 2013-10-01 |