Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7567682 | Audio processing apparatus | Yuji Yamada, Hirofumi Kurisu | 2009-07-28 |
| 7502477 | Audio reproducing apparatus | Yuji Yamada | 2009-03-10 |
| 6968062 | Transmitter of infrared transmission system and reproducing apparatus comprising headphone device | — | 2005-11-22 |
| 6928179 | Audio processing apparatus | Yuji Yamada, Hirofumi Kurisu | 2005-08-09 |
| 6021205 | Headphone device | Yuji Yamada | 2000-02-01 |
| 5959597 | Image/audio reproducing system | Yuji Yamada | 1999-09-28 |
| 5844816 | Angle detection apparatus and audio reproduction apparatus using it | Yuji Yamada | 1998-12-01 |
| 5796843 | Video signal and audio signal reproducing apparatus | Yuji Yamada | 1998-08-18 |
| 5761314 | Audio reproducing apparatus and headphone | Yuji Yamada | 1998-06-02 |
| 5757931 | Signal processing apparatus and acoustic reproducing apparatus | Yuji Yamada | 1998-05-26 |
| 5717767 | Angle detection apparatus and audio reproduction apparatus using it | Yuji Yamada | 1998-02-10 |
| 5717727 | Digital filter and apparatus for reproducing sound using the digital filter | Yuji Yamada | 1998-02-10 |
| 5696420 | Vibration type gyroscope apparatus | Yuji Yamada | 1997-12-09 |
| 5696831 | Audio reproducing apparatus corresponding to picture | Yuji Yamada | 1997-12-09 |
| 5687239 | Audio reproduction apparatus | Yuji Yamada | 1997-11-11 |
| 5590094 | System and methd for reproducing sound | Yuji Yamada | 1996-12-31 |
| 5526429 | Headphone apparatus having means for detecting gyration of user's head | Yuji Yamada | 1996-06-11 |
| 5495534 | Audio signal reproducing apparatus | Hiroyuki Sogawa, Yasuhiro Iida, Yabe Susumu | 1996-02-27 |
| 5452359 | Acoustic signal reproducing apparatus | Hiroyuki Sogawa, Yasuhiro Iida, Susumu Yabe | 1995-09-19 |
| 5367506 | Sound collecting system and sound reproducing system | Yuji Yamada | 1994-11-22 |
| 5276740 | Earphone device | Hiroyuki Sogawa, Yasuhiro Iida, Akira Kimura | 1994-01-04 |
| 5228089 | Hearing aid | Masayoshi Miura, Hiroyuki Sogawa, Yasuhiro Iida | 1993-07-13 |
| 5181248 | Acoustic signal reproducing apparatus | Yashuhiro Iida, Hiroyuki Sogawa, Susumu Yabe | 1993-01-19 |
| 5062140 | Induction speaker | Hiroyuki Sogawa, Shiro Tsukamoto | 1991-10-29 |
| 5022486 | Sound reproducing apparatus | Masayoshi Miura, Hiroyuki Sogawa, Yasuhiro Iida | 1991-06-11 |