Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7711131 | Electric-acoustic transducer and electric-acoustic transducer/housing assembly | — | 2010-05-04 |
| 7266213 | Compact speaker with a protective cover | — | 2007-09-04 |
| 7162050 | Compound sound generator | Hironori Kuwabara | 2007-01-09 |
| 7158650 | Electroacoustic transducer | Hironori Kuwabara | 2007-01-02 |
| 7142686 | Compound sound generator | Hironori Kuwabara | 2006-11-28 |
| 7010140 | Electroacoustic transducer | — | 2006-03-07 |
| 6744895 | Loudspeaker | Kazumi Miyamoto | 2004-06-01 |
| 6711274 | Compound speaker for a portable communication device | Masato Asahina | 2004-03-23 |
| D487455 | Telephone receiver with a speaker | Masato Asahina | 2004-03-09 |
| D487083 | Telephone receiver with a speaker | Masato Asahina | 2004-02-24 |