Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10015159 | Terminal authentication system, server device, and terminal authentication method | Saburo Toyonaga, Hiroyuki Tanaka, Masakatsu Matsuo | 2018-07-03 |
| 9692770 | Signature verification using unidirectional function | Saburo Toyonaga, Hiroyuki Tanaka, Masakatsu Matsuo | 2017-06-27 |
| 9525557 | Certificate issuing system, client terminal, server device, certificate acquisition method, and certificate issuing method | Hiroyuki Tanaka, Saburo Toyonaga, Masakatsu Matsuo | 2016-12-20 |
| 6384624 | Logical operational circuit using two stage neumos circuits | Hiroto Yasuura | 2002-05-07 |