Issued Patents All Time
Showing 26–39 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6897725 | Class D amplifier | — | 2005-05-24 |
| 6882222 | Low pass filter for output of D-class amplifier | Tsutomu Kawamoto | 2005-04-19 |
| 6839250 | Active EMI filter with feed forward cancellation | Toshio Takahashi, Brian R. Pelly | 2005-01-04 |
| 6775157 | Closed loop active EMI filter for reducing common or differential noise based on an error value | — | 2004-08-10 |
| 6744310 | Power amplifying device | — | 2004-06-01 |
| 6710653 | D-class power amplifier with electric power regeneration function | Tsutomu Kawamoto | 2004-03-23 |
| 6551801 | Process for preparing purified dimer of bone-derived factor | Hidetoshi Andou, Sjunjiro Sugimoto | 2003-04-22 |
| 5933337 | Voltage rectifying and smoothing circuit | Yuji Teramae | 1999-08-03 |
| 5543760 | Protection circuit for a power amplifier | Kunihiro Miyata | 1996-08-06 |
| 5488258 | Circuit for muting noises in a power amplifier | — | 1996-01-30 |
| 5444419 | Power amplifier having a temperature compensation circuit | — | 1995-08-22 |
| 5383083 | Protective apparatus for power transistor | Ryuichi Shinoda, Kunihiro Miyata | 1995-01-17 |
| 5315662 | Karaoke equipment | Kazuhiro Hayashi, Michitaka Fujita, Kunihiro Miyata | 1994-05-24 |
| 5053936 | Frequency/voltage converting device | Hiroyuki Kubozoe | 1991-10-01 |