Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8270657 | Earphone device and sound generating apparatus equipped with the same | Souichi Takigawa, Yoshikatsu Matsubara, Masayoshi Yamashita, Tsuneyasu Demukai | 2012-09-18 |
| D589929 | Combined speaker and amplifier | Sunao Okamura | 2009-04-07 |
| D579914 | Combined speaker and amplifier | Sunao Okamura | 2008-11-04 |
| D579441 | Combined speaker and amplifier | Sunao Okamura | 2008-10-28 |
| D538259 | Combined speaker and amplifier | Sunao Okamura | 2007-03-13 |
| D520494 | Speaker | Sunao Okamura | 2006-05-09 |
| D265832 | Electric organ | Yasuhiro Kira, Yoshiro Watabiki, Katsumi Koyama | 1982-08-17 |
| D255366 | Electric piano, or the like | Sadayoshi Karaki | 1980-06-10 |