Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6794799 | Piezoelectric electroacoustic transducer | Tetsuo Takeshima, Manabu Sumita | 2004-09-21 |
| 6720713 | Piezoelectric resonant component | Shigemasa Kusabiraki, Takeshi Yamazaki | 2004-04-13 |