Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9628281 | Server generating basic signature data using signing target data, electronic signature value and timestamp | Masakazu Uehata, Koichi Shibata | 2017-04-18 |
| 9363411 | Data certification system, server device, client device, publishing server, and data certification method | Masakazu Uehata, Hitoshi Yoshida, Toshio Takahashi | 2016-06-07 |
| 9231766 | Information processing device and information processing program | — | 2016-01-05 |
| 9158937 | Information processing device and information processing program | — | 2015-10-13 |
| 9130973 | Long-term signature terminal, long-term signature server, long-term signature terminal program, and long-term signature server program | — | 2015-09-08 |
| 9100419 | Long-term signature terminal, long-term signature server, long-term signature terminal program, and long-term signature server program | — | 2015-08-04 |
| 8819441 | Long-term signature server, long-term signature terminal, and long-term signature verification server | Masakazu Uehata, Koichi Shibata | 2014-08-26 |