Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10989733 | Acceleration sensor, geophone, and seismic prospecting system | Yuudai KAMADA, Noriyuki Sakuma, Takashi Shiota, Chisaki Takubo | 2021-04-27 |
| 10935566 | Acceleration sensor | Yuudai KAMADA, Noriyuki Sakuma, Chisaki Takubo, Tomonori Sekiguchi | 2021-03-02 |