Issued Patents All Time
Showing 26–50 of 101 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8369542 | Power control apparatus, speaker apparatus and power control method | Takanori Shimizu | 2013-02-05 |
| 8130982 | Signal amplifying apparatus, amplification system, and signal amplification method | Masaya Kano, Hironari Kawai | 2012-03-06 |
| 8094842 | Loudspeaker system and loudspeaker enclosure | Akira Arai | 2012-01-10 |
| 8050424 | Speaker system, audio amplifier and audio system | — | 2011-11-01 |
| 7986792 | Adapter connectable between audio amplifier and transmitter for cordless speaker | — | 2011-07-26 |
| 7940943 | Speaker driving apparatus | Akira Arai | 2011-05-10 |
| 7912229 | Array driving system and method of driving loads | Shin Ito | 2011-03-22 |
| 7481295 | Speaker system and speaker enclosure | Akira Arai | 2009-01-27 |
| 7362180 | Protection circuit of digital amplifier | Hajime Asahira | 2008-04-22 |
| 7301094 | Device for driving vibration source | Takahiro Tanaka, Nobukazu Toba, Kiyoshi Yamaki | 2007-11-27 |
| 7268621 | Digital amplifier | Masaya Kanoh | 2007-09-11 |
| 7253350 | Vibration source driving device | Takahiro Tanaka, Nobukazu Toba, Kiyoshi Yamaki | 2007-08-07 |
| 7209374 | Capacitor-input positive and negative power supply circuit | — | 2007-04-24 |
| 7119499 | Switching power device | Yuzo Ishigaki | 2006-10-10 |
| 7075123 | Semiconductor input protection circuit | Nobuaki Tsuji, Terumitsu Maeno, Seiji Hirade | 2006-07-11 |
| 6980058 | Amplifier circuitry | — | 2005-12-27 |
| 6937091 | Class D amplifier | Yasuomi Tanaka | 2005-08-30 |
| 6903607 | Operational amplifier | Nobuaki Tsuji, Kunihiko Mitsuoka | 2005-06-07 |
| 6903577 | Delay circuit | Nobuaki Tsuji, Kunihiko Mitsuoka, Yasuhiko Sekimoto, Masamitsu Hirano | 2005-06-07 |
| 6885532 | Current detection and overcurrent protection for transistors in pulse-width modulation amplifier | — | 2005-04-26 |
| 6859096 | Class D amplifier | Yasuomi Tanaka | 2005-02-22 |
| 6847059 | Semiconductor input protection circuit | Nobuaki Tsuji, Terumitsu Maeno, Seiji Hirade | 2005-01-25 |
| 6791405 | Triangular wave generating circuit used in a Class-D amplifier | Nobuaki Tsuji | 2004-09-14 |
| 6788792 | Device for amplitude adjustment and rectification made with MOS technology | Toshio Maejima | 2004-09-07 |
| 6778011 | Pulse-width modulation circuit and power amplifier circuit | Nobuaki Tsuji | 2004-08-17 |