Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11108377 | Quartz crystal resonator and quartz crystal resonator unit | Isao Ikeda | 2021-08-31 |
| 11108378 | Method of manufacturing quartz crystal resonator and quartz crystal resonator unit | Isao Ikeda | 2021-08-31 |