Issued Patents 2018
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10135420 | Quartz crystal blank and quartz crystal resonator unit | Hiroshi Ibaragi, Hiroyuki Yamamoto | 2018-11-20 |
| 9985604 | Quartz crystal blank and quartz crystal resonator unit | Hiroyuki Yamamoto, Hiroshi Ibaragi | 2018-05-29 |