Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8775796 | Certificate authenticating method, certificate issuing device, and authentication device | Masahisa Kawashima, Yukio Tsuruoka, Kenji Takahashi, Shingo Orihara | 2014-07-08 |
| 8595816 | User authentication system and method for the same | Nachi Ueno, Kenji Takahashi, Yukio Tsuruoka, Shingo Orihara | 2013-11-26 |
| 8352743 | Client device, key device, service providing apparatus, user authentication system, user authentication method, program, and recording medium | Yukio Tsuruoka, Shingo Orihara, Kenji Takahashi | 2013-01-08 |
| 8291231 | Common key setting method, relay apparatus, and program | Nachi Ueno, Shingo Orihara, Yukio Tsuruoka | 2012-10-16 |
| 7861288 | User authentication system for providing online services based on the transmission address | Yukio Tsuruoka, Yoshinao Kikuchi, Shintaro Mizuno, Kenji Takahashi | 2010-12-28 |
| 7539858 | Packet encryption substituting device, method thereof, and program recording medium | Katsunori Matsuura | 2009-05-26 |