Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7067959 | Piezoelectric diaphragm and piezoelectric electroacoustic transducer using the same | Tetsuo Takeshima, Yuji Kosugi | 2006-06-27 |
| 7042138 | Piezoelectric acoustic transducer | Yuko Yokoi, Manabu Sumita | 2006-05-09 |
| 6894423 | Piezoelectric electroacoustic transducer | Tetsuo Takeshima, Yoshitaka Nakamura | 2005-05-17 |
| 6744180 | Piezoelectric electroacoustic transducer | Yoshitaka Nakamura, Tetsuo Takeshima, Yuko Yokoi, Tadashi Okuzawa | 2004-06-01 |
| 6570299 | Piezoelectric electroacoustic transducer and manufacturing method of the same | Tetsuo Takeshima, Manabu Sumita, Yuichi Sakai | 2003-05-27 |