Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7120267 | Headset | Tomohiro Ito | 2006-10-10 |
| 6979231 | Switch-equipped input-output plug | — | 2005-12-27 |
| 6587571 | Speaker | Masao Fujihira, Kenji Tokushige | 2003-07-01 |
| 6542617 | Speaker | Masao Fujihira, Kenji Tokushige | 2003-04-01 |
| 6175637 | Acoustic transducer | Masao Fujihira, Makoto Yamagishi, Jun Kishigami, Takahiro Muraguchi, Kenji Tokushige | 2001-01-16 |
| 6035052 | Acoustic transducer | Masao Fujihira, Makoto Yamagishi, Jun Kishigami, Takahiro Muraguchi | 2000-03-07 |
| 5519782 | Headphone | Kenichi Katayama, Mitsuhiro Nakamura | 1996-05-21 |
| 5420935 | Auricle insertion headphone with improved grill | Kenichi Katayama, Koji Nageno | 1995-05-30 |
| 5115473 | Transducer having two ducts | Makoto Yamagishi, Masao Fujihira, Kazuo Azami | 1992-05-19 |