Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9819415 | Interference cancellation device and interference cancellation method | — | 2017-11-14 |
| 9419724 | Coherent optical receiver and optical receiving method | — | 2016-08-16 |
| 9124372 | Optical transmission system and optical transmission method | — | 2015-09-01 |
| 8989603 | Coherent optical receiver and coherent optical receiving method | — | 2015-03-24 |
| 8098990 | System and method for providing wireless over a passive optical network (PON) | Junqiang Hu, Ting Wang, Dayou Qian, Yuanqiu Luo, Yoshihiko Suemura | 2012-01-17 |
| 7894374 | Network system, spanning tree configuration method, spanning tree configuration node, and spanning tree configuration program | Nobuyuki Enomoto, Masaki Umayabashi, Youichi Hidaka, Atsushi Iwata | 2011-02-22 |
| 7855981 | Network system, spanning tree configuration method, spanning tree configuration node, and spanning tree configuration program | Nobuyuki Enomoto, Masaki Umayabashi, Youichi Hidaka, Atsushi Iwata | 2010-12-21 |
| 7783705 | Frame transfer method and node in Ethernet | Youichi Hidaka, Atsushi Iwata, Masaki Umayabashi, Nobuyuki Enomoto | 2010-08-24 |
| 7646789 | Communication system including several communication terminals and server, its communication terminal, its server and data transfer control program | Masaki Umayabashi, Satomi Shioiri, Kazuo Takagi | 2010-01-12 |
| 7200155 | Communication system capable of efficiently transmitting data from terminals to server | Masaki Umayabashi, Kazuo Takagi | 2007-04-03 |
| 6414415 | Surface acoustic wave device and method for manufacturing the same | Toshiyuki Fuyutsume, Shingo Iwasa | 2002-07-02 |
| 6087756 | Surface acoustic wave | — | 2000-07-11 |
| 5847852 | Optical network | Wataru Domon | 1998-12-08 |
| 5771111 | Optical network | Wataru Domon | 1998-06-23 |
| 5751455 | Optical transmission system and optical network terminals used therein | Katsumi Emura | 1998-05-12 |
| 5570219 | Optical transmitter for subcarrier frequency multiplexed optical transmission system | Toshiharu Yasugi, Akihiro Kanazawa | 1996-10-29 |
| 5504826 | Optical module for subcarrier multiplexed optical transmission system | Wataru Domon | 1996-04-02 |
| 5400391 | Mobile communication system | Katsumi Emura, Junji Namiki, Toshihito Kanai | 1995-03-21 |
| 5373152 | Resonance-type optical receiver circuit having a maximum amplifier input controlled by using an amplifier feedback and its method of receiving | Wataru Domon | 1994-12-13 |
| 5371354 | Resonance-type optical receiver circuit and method of receiving light wave | Wataru Domon | 1994-12-06 |
| 5367156 | Resonance-type optical receiver and receiving method for low-frequency signals | Wataru Domon | 1994-11-22 |
| 5138476 | Polarization deversity heterodyne receiver of a baseband combining type in which I.E. signals are adjusted by negative feedback from a device output signal | — | 1992-08-11 |
| 5107512 | Frequency stabilization of a laser beam by using a birefrigent body | — | 1992-04-21 |
| 5023946 | Polarization diversity optical heterodyne receiver with phase adjustment of two I.F. signals for control of a local optical source | Shuntaro Yamazaki | 1991-06-11 |
| 4972515 | Polarization diversity receiver having little deteriorated sensitivity despite use of a square-law demodulator having a restricted dynamic range | — | 1990-11-20 |