Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7061164 | Crystal oscillator | Takahiko Iwasaki, Shigeru Obara, Masaaki Nakahara | 2006-06-13 |
| 7011887 | IT-cut quartz crystal unit | Shigeru Obara, Kouichi Hara | 2006-03-14 |
| 6680560 | Heat resistant quartz-crystal unit | Mikio Saito, Shigeru Obara, Mituaki Koyama | 2004-01-20 |