Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11151763 | Information presentation device, information presentation method, and storage medium | Yeonsoo Yang, Yukako Tanaka, Fumiaki Oohata, Katsuya Hino, Saki Sakai | 2021-10-19 |
| 9753566 | Electronic book with extra free content | Yoshiyuki Tsuzuki, Takashi Nishimura | 2017-09-05 |
| 9166781 | Key change management apparatus and key change management method | Masato Shimano, Masaaki Miki, Yoshiyuki Tsuzuki, Isao Takeyasu, Eiji Tokita | 2015-10-20 |