Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10521990 | Digital key system | Akihiro Sato, Masami Umemura | 2019-12-31 |
| 9053592 | Key management box | Akihiro Sato, Masami Umemura | 2015-06-09 |
| 8248206 | Key management box | Akihiro Sato, Masami Umemura, Tsutomu Toki, Shigeo Fujiyoshi, Yoshiaki Muto | 2012-08-21 |