Issued Patents All Time
Showing 1–25 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8728229 | Cement slurry composition | Koji Koyanagi, Hotaka Yamamuro | 2014-05-20 |
| 8648120 | Liquid rheology modifier | Koji Koyanagi, Hotaka Yamamuro | 2014-02-11 |
| 7501021 | Rheology modifier | Koji Koyanagi, Fujio Yamato, Hotaka Yamamuro | 2009-03-10 |
| 7103107 | Demodulator, receiver, and communication system | Mari Matsunaga | 2006-09-05 |
| 7095778 | Spread spectrum transmitter and spread spectrum receiver | Seiji Okubo, Tatsuya Uchiki | 2006-08-22 |
| 6983134 | Method and apparatus for automatic frequency control and demodulator | Takashi Asahara | 2006-01-03 |
| 6940892 | Spread spectrum transmission apparatus, spread spectrum reception apparatus, and spread spectrum communication system | Seiji Okubo, Tatsuya Uchiki | 2005-09-06 |
| 6850576 | Method and apparatus for reproducing timing, and a demodulating apparatus that uses the method and apparatus for reproducing timing | Akinori Fujimura, Seiji Okubo | 2005-02-01 |
| 6728298 | Spread spectrum communication system and method for the same | Seiji Okubo, Akinori Fujimura | 2004-04-27 |
| 6683493 | Timing reproducing device and demodulator | Akinori Fujimora, Seiji Okubo | 2004-01-27 |
| 6650718 | Timing reproducer and demodulator comprising this | Akinori Fujimura, Seiji Okubo | 2003-11-18 |
| 6631174 | Automatic frequency control apparatus | Takashi Asahara | 2003-10-07 |
| 6601213 | Demodulator and communications system | Tatsuya Uchiki | 2003-07-29 |
| 6522684 | Delay lock loop, receiver, and spectrum spreading communication system | Seiji Okubo, Akinori Fujimura | 2003-02-18 |
| 6473472 | Adaptive array communication system and receiver | Tatsuya Uchiki | 2002-10-29 |
| 6456672 | Automatic frequency control communication system | Tatsuya Uchiki, Hiroyasu Sano, Seiji Okubo, Makoto Miyake | 2002-09-24 |
| 6415004 | Phase detector, timing recovery device using the same, and a demodulator using the timing recovery device | Akinori Fujimura | 2002-07-02 |
| 6353642 | Automatic frequency controller and demodulator unit | Takashi Asahara | 2002-03-05 |
| 6212222 | Initial acquisition circuit | Seiji Okubo, Akinori Fujimura, Takashi Asahara | 2001-04-03 |
| 6115417 | Signal quality measuring scheme | Mari Matsunaga, Takashi Asahara | 2000-09-05 |
| 5995520 | Carrier slip compensation method for coherent detection | Tatsuya Uchiki | 1999-11-30 |
| 5953383 | Diversity receiver | — | 1999-09-14 |
| 5844907 | Synchronization determining circuit, demodulator and communication system | Tatsuya Uchiki | 1998-12-01 |
| 5659582 | Receiver, automatic gain controller suitable for the receiver, control signal generator suitable for the automatic gain controller, reception power controller using the automatic gain controller and communication method using the receiver | Tatsuya Uchiki | 1997-08-19 |
| 5578947 | Delayed detection type demodulator | — | 1996-11-26 |