Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8265301 | Audio signal processing apparatus, audio signal processing method, program, and input apparatus | Tadaaki Kimijima, Gen Ichimura, Masayoshi Noguchi, Kazuaki Toba, Hideya Muraoka | 2012-09-11 |
| 7822216 | Electroacoustic transducer using diaphragm and method for producing diaphragm | Yoshio Ohashi, Masaru Uryu | 2010-10-26 |
| 6175637 | Acoustic transducer | Masao Fujihira, Makoto Yamagishi, Takahiro Muraguchi, Kenji Tokushige, Ikuo Shinohara | 2001-01-16 |
| 6160894 | Speaker apparatus and sound reproduction system employing same | Masao Fujihira, Takahiro Muraguchi | 2000-12-12 |
| 6035052 | Acoustic transducer | Masao Fujihira, Makoto Yamagishi, Takahiro Muraguchi, Ikuo Shinohara | 2000-03-07 |
| 6026690 | Vibration sensor using the capacitance between a substrate and a flexible diaphragm | Yoshimori Nakagawa | 2000-02-22 |
| 5972159 | Optical recording disc recycling method | Masaru Uryu, Kunihiko Tokura | 1999-10-26 |
| 5909496 | Speaker apparatus | Masao Fujihira, Takahiro Muraguchi | 1999-06-01 |
| 5862237 | Speaker apparatus | Masao Fujihira, Takahiro Muraguchi | 1999-01-19 |
| 5827965 | Navigation device employing an electret vibration sensor | Yoshimori Nakagawa | 1998-10-27 |
| 5798460 | Vibration sensor employing a flexible diaphragm and an electret film | Yoshimori Nakagawa | 1998-08-25 |
| 4252211 | Loudspeaker | Atsushi Matsuda | 1981-02-24 |
| 4198550 | Peripherally reinforced laminated loudspeaker diaphragm | Atsushi Matsuda, Masaaki Nishimura | 1980-04-15 |
| 4191863 | Support for multi-point magnetic driver loudspeaker | Atsushi Matsuda | 1980-03-04 |