Issued Patents All Time
Showing 1–25 of 68 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10735852 | Speaker system | Toshiyuki Matsumura | 2020-08-04 |
| 10491984 | Speaker device | Kazuki Honda, Takafumi Yuasa, Akihisa Kawamura, Toshiyuki Matsumura, Satoshi Takayama +3 more | 2019-11-26 |
| 10462553 | Speaker device | Toshiyuki Matsumura, Akihisa Kawamura | 2019-10-29 |
| 9820047 | Signal processing method and speaker system | Akihisa Kawamura, Toshiyuki Matsumura, Isao Kakuhari, Satoshi Takayama, Kazuki Honda +1 more | 2017-11-14 |
| 9774935 | Speaker device | Toshiyuki Matsumura, Akihisa Kawamura, Kazuki Honda, Takafumi Yuasa, Satoshi Takayama | 2017-09-26 |
| 9668058 | Speaker diaphragm, speaker, device, and method for manufacturing speaker diaphragm | Toshiyuki Matsumura | 2017-05-30 |
| 9432773 | Speaker and audio-visual system | Atsushi Sakaguchi, Toshiyuki Matsumura | 2016-08-30 |
| 9414151 | Speaker system | Sawako Kano, Toshiyuki Matsumura | 2016-08-09 |
| 9319767 | Earphone | Atsushi Sakaguchi, Toshiyuki Matsumura, Sawako Kano, Akiko Fujise | 2016-04-19 |
| 9288580 | Speaker device, audio visual equipment, mobile information processing apparatus, vehicle, and earphone | Toshiyuki Matsumura | 2016-03-15 |
| 9247349 | Loudspeaker, video device, and portable information processing apparatus | Hiroyuki Takewa | 2016-01-26 |
| 9131304 | Loudspeaker and equipment including the same | Atsushi Sakaguchi, Toshiyuki Matsumura, Sawako Kano, Akiko Fujise, Takafumi Yuasa | 2015-09-08 |
| 9094750 | Loudspeaker, inner-ear headphone including loudspeaker, and hearing aid including loudspeaker | Akiko Fujise, Sawako Kano, Toshiyuki Matsumura, Atsushi Sakaguchi | 2015-07-28 |
| 8885866 | Earphone | Atsushi Sakaguchi | 2014-11-11 |
| 8755558 | Speaker, hearing aid, earphone, and portable terminal device | — | 2014-06-17 |
| 8699745 | Speaker, and mobile electronic device | — | 2014-04-15 |
| 8699744 | Speaker, hearing aid, inner-ear headphone, portable information processing device, and AV device | Atsushi Sakaguchi, Toshiyuki Matsumura | 2014-04-15 |
| 8699738 | Speaker system with resonance frequency approximately identical to the peak frequency of the sound pressure | — | 2014-04-15 |
| 8565463 | Loudspeaker system | Toshiyuki Matsumura | 2013-10-22 |
| 8553924 | Speaker, speaker device using the same and electronic apparatus and vehicle using the speaker | Masahide Sumiyama, Satoshi Koura, Yoshimichi Kajihara, Koji Sano, Kazuki Honda +3 more | 2013-10-08 |
| 8542861 | Loudspeaker, video device, and portable information processing apparatus | Hiroyuki Takewa | 2013-09-24 |
| 8335336 | Vibration device and acoustic system | Mitsukazu Kuze, Toshiyuki Matsumura | 2012-12-18 |
| 8335333 | Speaker system | Toshiyuki Matsumura, Akiko Fujise | 2012-12-18 |
| 8265330 | Material for speaker device and speaker device using it | Yoshiharu Fukunishi, Takanori Kitamura, Kengo Tabata, Toshiyuki Matsumura, Yoshimichi Kajihara +1 more | 2012-09-11 |
| 8184826 | Speaker system | Toshiyuki Matsumura | 2012-05-22 |