Hiroyuki Itoh

Person

Kawasaki, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for detection of failure of an optical amplifier
- Patent number 9,190,801
- Issue date Nov 17, 2015
- Fujitsu Limited
- Hiroyuki Itoh
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical amplifier and method
- Patent number 8,922,878
- Issue date Dec 30, 2014
- Fujitsu Limited
- Hiroyuki Itoh
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission apparatus and optical signal level checking me...
- Patent number 8,422,121
- Issue date Apr 16, 2013
- Fujitsu Limited
- Hiroyuki Itoh
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
WDM optical transmission system and optical amplifying apparatus
- Patent number 7,899,331
- Issue date Mar 1, 2011
- Fujitsu Limited
- Hiroyuki Itoh
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical amplifier
- Patent number 7,215,464
- Issue date May 8, 2007
- Fujitsu Limited
- Kosuke Komaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
TRANSMITTING DEVICE, FAILURE DIAGNOSIS METHOD, AND COMMUNICATION SY...
- Publication number 20170149495
- Publication date May 25, 2017
- Fujitsu Limited
- Hiroyuki ITOH
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL AMPLIFIER AND FAILURE DETECTION METHOD
- Publication number 20140158867
- Publication date Jun 12, 2014
- Fujitsu Limited
- Hiroyuki ITOH
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
OPTICAL AMPLIFIER AND METHOD
- Publication number 20140029082
- Publication date Jan 30, 2014
- Fujitsu Limited
- Hiroyuki ITOH
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
OPTICAL TRANSMISSION EQUIPMENT
- Publication number 20120141121
- Publication date Jun 7, 2012
- Fujitsu Limited
- Hiroyuki ITOH
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL TRANSMISSION APPARATUS AND OPTICAL SIGNAL LEVEL CHECKING ME...
- Publication number 20100315702
- Publication date Dec 16, 2010
- FUJITSU LIMITED
- Hiroyuki ITOH
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
WDM optical transimission system and optical amplifying apparatus
- Publication number 20080080867
- Publication date Apr 3, 2008
- FUJITSU LIMITED
- Hiroyuki Itoh
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL AMPLIFIER
- Publication number 20070109630
- Publication date May 17, 2007
- FUJITSU LIMITED
- Kosuke Komaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Hiroyuki Itoh

Person

Patents Grantslast 30 patents

Method and apparatus for detection of failure of an optical amplifier

Optical amplifier and method

Optical transmission apparatus and optical signal level checking me...

WDM optical transmission system and optical amplifying apparatus

Optical amplifier

Patents Applicationslast 30 patents

TRANSMITTING DEVICE, FAILURE DIAGNOSIS METHOD, AND COMMUNICATION SY...

OPTICAL AMPLIFIER AND FAILURE DETECTION METHOD

OPTICAL AMPLIFIER AND METHOD

OPTICAL TRANSMISSION EQUIPMENT

OPTICAL TRANSMISSION APPARATUS AND OPTICAL SIGNAL LEVEL CHECKING ME...

WDM optical transimission system and optical amplifying apparatus

OPTICAL AMPLIFIER