Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6965680 | Piezoelectric electro-acoustic transducer | Masakazu Yamauchi, Tetsuo Takeshima | 2005-11-15 |
| 6888947 | Piezoelectric electroacoustic transducer | Tetsuo Takeshima, Masakazu Yamauchi | 2005-05-03 |