Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7953974 | Authentication method, authentication system, and tag device thereof, data reference client, authentication server, and data server | Shinya Yamamura, Yoshiharu Sato | 2011-05-31 |
| 4584978 | Method and apparatus for controlling spark timing in internal combustion engines | Kiyotaka Sasaki, Ryosuke Tachi | 1986-04-29 |