Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11182466 | User authentication apparatus and recording media | Kenji Ikeda, Kazuhiro Uehara | 2021-11-23 |
| 8913772 | Ear speaker device | Yukimasa Yamaguchi, Satoshi Suzuki | 2014-12-16 |
| 8885865 | Earphone | — | 2014-11-11 |
| 8660288 | Twin driver earphone | — | 2014-02-25 |
| 8538059 | Ear speaker device | Hideki Seki, Noriyuki Hiyama, Yukimasa Yamaguchi, Takeshi Hara | 2013-09-17 |
| 8254613 | Speaker apparatus | Hideki Seki, Yousuke Takahashi | 2012-08-28 |
| 8213632 | Electroacoustic transducer and ear speaker device | Toru Sasaki | 2012-07-03 |
| 8175316 | Ear speaker device | Hideki Seki, Noriyuki Hiyama, Yukimasa Yamaguchi, Takeshi Hara | 2012-05-08 |
| 7184562 | Loudspeaker apparatus | Hideki Seki | 2007-02-27 |
| 6356643 | Electro-acoustic transducer | Masao Fujihira | 2002-03-12 |
| 6307943 | Electro-acoustic transducer and housing | — | 2001-10-23 |
| 6175637 | Acoustic transducer | Masao Fujihira, Jun Kishigami, Takahiro Muraguchi, Kenji Tokushige, Ikuo Shinohara | 2001-01-16 |
| 6057659 | Speaker apparatus | Akihiro Akiyama, Naoki Watanabe | 2000-05-02 |
| 6035052 | Acoustic transducer | Masao Fujihira, Jun Kishigami, Takahiro Muraguchi, Ikuo Shinohara | 2000-03-07 |
| 5835612 | Speaker apparatus | Masao Fujihira, Kazuo Azami | 1998-11-10 |
| 5802194 | Stereo loudspeaker system with tweeters mounted on rotatable enlongated arms | Yutaka Kagawa, Akihiro Akiyama, Kazuo Ichikawa | 1998-09-01 |
| 5459290 | Acoustic transducer and acoustic transducing system | — | 1995-10-17 |
| 5115473 | Transducer having two ducts | Masao Fujihira, Kazuo Azami, Ikuo Shinohara | 1992-05-19 |
| 5048092 | Electroacoustic transducer apparatus | Satoshi Matui | 1991-09-10 |
| 4981194 | Electro-acoustic transducer | Yoshiyuki Kamon, Masahiko ISO | 1991-01-01 |
| 4965838 | Ear piece transducer | Yoshiyuki Kamon | 1990-10-23 |
| 4742887 | Open-air type earphone | — | 1988-05-10 |
| 4727748 | Method and apparatus for detecting leaks in a gas pipe line | Hidekazu Horigome, Takahiro Onishi | 1988-03-01 |
| 4651559 | Method and apparatus for detecting leaks in a gas pipe line | Hidekazu Horigome, Takahiro Onishi | 1987-03-24 |
| 4646872 | Earphone | Yoshiyuki Kamon, Shingo Watanabe | 1987-03-03 |