Issued Patents 2018
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10027309 | Quartz crystal blank and quartz crystal resonator unit | Hiroyuki Yamamoto, Hiroaki Kaida | 2018-07-17 |
| 10009005 | Quartz crystal blank and quartz crystal resonator unit | Hiroaki Kaida | 2018-06-26 |
| 9985603 | Quartz crystal blank and quartz crystal resonator unit | Hiroyuki Yamamoto, Hiroaki Kaida | 2018-05-29 |
| 9905747 | Crystal vibration device | Hiroyuki Yamamoto | 2018-02-27 |