Eiji Ishikawa

Person

Hokkaido, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Transmission apparatus, transmission system, and transmission method
- Patent number 10,637,564
- Issue date Apr 28, 2020
- Fujitsu Limited
- Eiji Ishikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Wavelength multiplexing apparatus and method
- Patent number 9,407,396
- Issue date Aug 2, 2016
- Fujitsu Limited
- Eiji Ishikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Phase control apparatus and optical DQPSK receiver
- Patent number 7,684,713
- Issue date Mar 23, 2010
- Fujitsu Limited
- Yoshikazu Terayama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission system
- Patent number 7,586,672
- Issue date Sep 8, 2009
- Fujitsu Limited
- Eiji Ishikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission system having function of correcting noise lig...
- Patent number 7,312,918
- Issue date Dec 25, 2007
- Fujitsu Limited
- Eiji Ishikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission system
- Patent number 7,251,072
- Issue date Jul 31, 2007
- Fujitsu Limited
- Toshihiro Ohtani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
TRANSMISSION APPARATUS, TRANSMISSION SYSTEM, AND TRANSMISSION METHOD
- Publication number 20190273557
- Publication date Sep 5, 2019
- Fujitsu Limited
- Eiji Ishikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
TRANSMISSION DEVICE AND TRANSMISSION METHOD
- Publication number 20180287726
- Publication date Oct 4, 2018
- Fujitsu Limited
- Eiji Ishikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
WAVELENGTH MULTIPLEXING APPARATUS AND METHOD
- Publication number 20150016822
- Publication date Jan 15, 2015
- Fujitsu Limited
- Eiji Ishikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Phase control apparatus and optical DQPSK receiver
- Publication number 20070292140
- Publication date Dec 20, 2007
- FUJITSU LIMITED
- Yoshikazu Terayama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical transmission system
- Publication number 20070242347
- Publication date Oct 18, 2007
- Fujitsu Limited
- Eiji Ishikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical transmission system having function of correcting noise lig...
- Publication number 20050213196
- Publication date Sep 29, 2005
- FUJITSU LIMITED
- Eiji Ishikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical transmission system
- Publication number 20040042063
- Publication date Mar 4, 2004
- FUJITSU LIMITED
- Toshihiro Ohtani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Eiji Ishikawa

Person

Patents Grantslast 30 patents

Transmission apparatus, transmission system, and transmission method

Wavelength multiplexing apparatus and method

Phase control apparatus and optical DQPSK receiver

Optical transmission system

Optical transmission system having function of correcting noise lig...

Optical transmission system

Patents Applicationslast 30 patents

TRANSMISSION APPARATUS, TRANSMISSION SYSTEM, AND TRANSMISSION METHOD

TRANSMISSION DEVICE AND TRANSMISSION METHOD

WAVELENGTH MULTIPLEXING APPARATUS AND METHOD

Phase control apparatus and optical DQPSK receiver

Optical transmission system

Optical transmission system having function of correcting noise lig...

Optical transmission system