Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7564177 | Crystal unit having stacked structure | Masahiro Yoshimatsu, Kozo Ono | 2009-07-21 |
| 7174620 | Method of manufacturing thin quartz crystal wafer | Akio Chiba, Kozo Ono | 2007-02-13 |
| 6930440 | Tuning fork type crystal unit and bar type crystal unit | Akio Chiba, Minoru Ishihara | 2005-08-16 |