Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7127614 | Justification authenticating system, personal certificate issuing system, and personal certificate | Yuichi Kawaguchi, Yuji Shimizu, Takashi Katsura, Hisashi Inoue | 2006-10-24 |
| 6435880 | Learning-support device and learning-support method | Makoto Matsuoka, Yuichi Kawaguchi | 2002-08-20 |