Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7409551 | Certificate validity authentication method and apparatus | Takahiro Fujishiro, Satoru Tezuka, Yoko Kumagai, Yutaka Miyazaki | 2008-08-05 |
| 7080251 | Certificate validity authentication method and apparatus | Takahiro Fujishiro, Satoru Tezuka, Yoko Kumagai, Yutaka Miyazaki | 2006-07-18 |