Tsutomu Chikazawa

Person

Yokohama, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Transmission device, transmission system, and transmission method
- Patent number 9,690,677
- Issue date Jun 27, 2017
- Fujitsu Limited
- Yutaka Hayama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus and method for switching communication channels having re...
- Patent number 9,602,395
- Issue date Mar 21, 2017
- Fujitsu Limited
- Toshiyuki Sakamoto
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Device for synchronizing between an active unit and a standby unit
- Patent number 7,778,160
- Issue date Aug 17, 2010
- Fujitsu Limited
- Takashi Kaiga
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Power supply monitoring device
- Patent number 7,408,475
- Issue date Aug 5, 2008
- Fujitsu Limited
- Koichi Sugama
- G01 - MEASURING TESTING
Information Patent Grant
Transmission apparatus with a function to switch a line in the even...
- Patent number 7,263,062
- Issue date Aug 28, 2007
- Fujitsu Limited
- Tsutomu Chikazawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical ring transmission system using squelch method
- Patent number 6,895,182
- Issue date May 17, 2005
- Fujitsu Limited
- Junichi Moriyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication device for switching connection from a working channe...
- Patent number 5,818,816
- Issue date Oct 6, 1998
- Fujitsu Limited
- Tsutomu Chikazawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
TRANSMISSION DEVICE, TRANSMISSION SYSTEM, AND TRANSMISSION METHOD
- Publication number 20160203063
- Publication date Jul 14, 2016
- Fujitsu Limited
- YUTAKA HAYAMA
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
APPARATUS AND METHOD FOR SWITCHING COMMUNICATION CHANNELS HAVING RE...
- Publication number 20140269264
- Publication date Sep 18, 2014
- Fujitsu Limited
- TOSHIYUKI SAKAMOTO
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
TRANSMISSION DEVICE
- Publication number 20080037592
- Publication date Feb 14, 2008
- Fujitsu Limited
- Takashi Kaiga
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Power supply monitoring device
- Publication number 20070222630
- Publication date Sep 27, 2007
- FUJITSU LIMITED
- Koichi Sugama
- G01 - MEASURING TESTING
Information Patent Application
Transmission device and upgrade method thereof
- Publication number 20060215681
- Publication date Sep 28, 2006
- FUJITSU LIMITED
- Tsutomu Chikazawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Multiplexer and usage thereof
- Publication number 20040141532
- Publication date Jul 22, 2004
- Tsutomu Chikazawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Transmission apparatus with a function to switch a line in the even...
- Publication number 20020024931
- Publication date Feb 28, 2002
- Tsutomu Chikazawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Tsutomu Chikazawa

Person

Patents Grantslast 30 patents

Transmission device, transmission system, and transmission method

Apparatus and method for switching communication channels having re...

Device for synchronizing between an active unit and a standby unit

Power supply monitoring device

Transmission apparatus with a function to switch a line in the even...

Optical ring transmission system using squelch method

Communication device for switching connection from a working channe...

Patents Applicationslast 30 patents

TRANSMISSION DEVICE, TRANSMISSION SYSTEM, AND TRANSMISSION METHOD

APPARATUS AND METHOD FOR SWITCHING COMMUNICATION CHANNELS HAVING RE...

TRANSMISSION DEVICE

Power supply monitoring device

Transmission device and upgrade method thereof

Multiplexer and usage thereof

Transmission apparatus with a function to switch a line in the even...