Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9628281 | Server generating basic signature data using signing target data, electronic signature value and timestamp | Shinichi Murao, Koichi Shibata | 2017-04-18 |
| 9363411 | Data certification system, server device, client device, publishing server, and data certification method | Shinichi Murao, Hitoshi Yoshida, Toshio Takahashi | 2016-06-07 |
| 8819441 | Long-term signature server, long-term signature terminal, and long-term signature verification server | Shinichi Murao, Koichi Shibata | 2014-08-26 |
| 8041980 | Time certifying server, reference time distributing server, time certifying method, reference time distributing method, time certifying program, and communication protocol program | — | 2011-10-18 |