Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9197959 | Headphone device | Yoshinari Fukushima | 2015-11-24 |
| 8846288 | External additive for toner and method for producing the same | Shinji Tanabe, Naoaki Narishige | 2014-09-30 |
| 8080357 | External additive for toner and method for producing the same | Shinji Tanabe, Naoaki Narishige | 2011-12-20 |
| 6666265 | Heat exchanger, method of manufacturing the heat exchanger, and method of manufacturing tube for heat exchange | Soichi Kato, Muneo Sakurada, Shin Kurihara, Shoji Akiyama, Jun Akaike | 2003-12-23 |
| 6591900 | Heat exchanger, tube for heat exchanger, and method of manufacturing the heat exchanger and the tube | Soichi Kato, Shoji Akiyama | 2003-07-15 |
| 4670903 | Echo canceller for attenuating acoustic echo signals on a frequency divisional manner | Takashi Araseki | 1987-06-02 |
| 4360708 | Speech processor having speech analyzer and synthesizer | Tetsu Taguchi | 1982-11-23 |
| 4317208 | ADPCM System for speech or like signals | Takashi Araseki | 1982-02-23 |