Issued Patents All Time
Showing 26–50 of 57 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9020181 | Earphone device | Tomohiro Matsuo, Takashi Ohta, Tomohiro Ito | 2015-04-28 |
| 9014410 | Earphone device | Tomohiro Matsuo, Takashi Ohta, Tomohiro Ito | 2015-04-21 |
| 9008345 | Earphone device | Tomohiro Matsuo, Takashi Ohta, Tomohiro Ito | 2015-04-14 |
| 8948435 | Driver unit and earphone device | Yuusuke Oosato, Takahiro Suzuki | 2015-02-03 |
| 8948439 | Acoustic conversion device and acoustic conversion device assembly method | Tsutomu Nagumo, Koji Matsuda, Takeshi Hara, Takahiro Suzuki, Takayuki Ishii +1 more | 2015-02-03 |
| 8913773 | Earphone device | Tomohiro Matsuo, Takashi Ohta, Tomohiro Ito | 2014-12-16 |
| 8634587 | Acoustic conversion device | Tsutomu Nagumo, Koji Matsuda, Takeshi Hara, Takahiro Suzuki, Takayuki Ishii +1 more | 2014-01-21 |
| 8630439 | Acoustic conversion device and acoustic conversion device assembly method | Tsutomu Nagumo, Koji Matsuda, Takeshi Hara, Takahiro Suzuki, Takayuki Ishii +1 more | 2014-01-14 |
| 8611581 | Earphone device | Tomohiro Matsuo, Takashi Ohta, Tomohiro Ito | 2013-12-17 |
| 8588456 | Acoustic conversion device | Tsutomu Nagumo, Koji Matsuda, Kenji Hiraiwa, Takayuki Ishii, Takeshi Hara +1 more | 2013-11-19 |
| 8532324 | Headphone | Yuusuke Oosato | 2013-09-10 |
| 8526659 | Earphone and acoustic transducer | Takahiro Suzuki, Takeshi Hara | 2013-09-03 |
| 8208676 | Earpiece and earphone | Katsunori Murozaki, Kiminobu Ichimura | 2012-06-26 |
| 8208672 | Headphone | Yuusuke Oosato | 2012-06-26 |
| 8009853 | Headphone device | Tomohiro Ito, Jo Wada | 2011-08-30 |
| 7245736 | Headphone device | Naotaka Tsunoda | 2007-07-17 |
| 7120268 | Headphone | Katsunori Murozaki | 2006-10-10 |
| 6970572 | Headphone device | Katsunori Murozaki | 2005-11-29 |
| 6738487 | Earphone | Hideki Seki, Naotaka Tsunoda, Takashi Ohta | 2004-05-18 |
| 6728388 | Headphone | Tomohiro Ito | 2004-04-27 |
| 6625293 | Microphone | Naoaki Matsumoto | 2003-09-23 |
| 6560346 | Pipe microphone device | Takashi Ohta, Katsunori Murozaki | 2003-05-06 |
| 6385325 | Headphone device | Tomohiro Ito | 2002-05-07 |
| RE37398 | Headphone | — | 2001-10-02 |
| 5949896 | Earphone | Katsunori Murozaki, Naotaka Tsunoda | 1999-09-07 |