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Akihiko Tsuchiya
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Fujisawa, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Communication apparatus and communication method
Patent number
9,137,158
Issue date
Sep 15, 2015
Hitachi, Ltd.
Taisuke Ueta
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Communication device, method for controlling the communication devi...
Patent number
9,065,862
Issue date
Jun 23, 2015
Hitachi, Ltd.
Masayuki Takase
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Passive optical network system and operating method thereof
Patent number
8,724,995
Issue date
May 13, 2014
Hitachi, Ltd.
Tohru Kazawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical multiplexing terminating device, passive optical network sy...
Patent number
8,532,491
Issue date
Sep 10, 2013
Hitachi, Ltd.
Norihiro Sakamoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Apparatus of adjusting optical signal transmission timing
Patent number
8,467,684
Issue date
Jun 18, 2013
Hitachi, Ltd.
Tohru Kazawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical access system
Patent number
8,457,492
Issue date
Jun 4, 2013
Hitachi, Ltd.
Masaki Ohira
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical passive network system and its operation method
Patent number
8,428,457
Issue date
Apr 23, 2013
Hitachi, Ltd.
Masahiko Mizutani
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Passive optical network system and communication method therefor
Patent number
8,107,824
Issue date
Jan 31, 2012
Hitachi, Ltd.
Akihiko Tsuchiya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Apparatus of adjusting optical signal transmission timing
Patent number
7,936,992
Issue date
May 3, 2011
Hitachi, Ltd.
Tohru Kazawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Apparatus of adjusting optical signal transmission timing
Patent number
7,548,694
Issue date
Jun 16, 2009
Hitachi Communication Technologies, Ltd.
Tohru Kazawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
METHOD FOR MONITORING CONNECTIVITY BY MEANS OF SUBSCRIBER TERMINAL...
Publication number
20140098676
Publication date
Apr 10, 2014
Hitachi, Ltd
Akihiko Tsuchiya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION DEVICE, METHOD FOR CONTROLLING THE COMMUNICATION DEVI...
Publication number
20140010233
Publication date
Jan 9, 2014
Masayuki TAKASE
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION APPARATUS AND COMMUNICATION METHOD
Publication number
20130322450
Publication date
Dec 5, 2013
Taisuke UETA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
METHOD OF CONNECTIVITY MONITORING BY SUBSCRIBER LINE TERMINATING AP...
Publication number
20120224488
Publication date
Sep 6, 2012
Masao NIIBE
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL MULTIPLEXING TERMINATING DEVICE, PASSIVE OPTICAL NETWORK SY...
Publication number
20120106958
Publication date
May 3, 2012
Hitachi, Ltd.
Norihiro Sakamoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
PASSIVE OPTICAL NETWORK SYSTEM AND OPERATING METHOD THEREOF
Publication number
20120008948
Publication date
Jan 12, 2012
HITACHI LTD.
Tohru Kazawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
APPARATUS OF ADJUSTING OPTICAL SIGNAL TRANSMISSION TIMING
Publication number
20110170871
Publication date
Jul 14, 2011
Hitachi, Ltd
Tohru Kazawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL ACCESS SYSTEM
Publication number
20100296811
Publication date
Nov 25, 2010
Hitachi, Ltd
Masaki Ohira
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL PASSIVE NETWORK SYSTEM AND ITS OPERATION METHOD
Publication number
20100272436
Publication date
Oct 28, 2010
Hitachi, Ltd.
Masahiko Mizutani
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
APPARATUS OF ADJUSTING OPTICAL SIGNAL TRANSMISSION TIMING
Publication number
20090214211
Publication date
Aug 27, 2009
Hitachi Communication Technologies, Ltd.
Tohru KAZAWA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
PASSIVE OPTICAL NETWORK SYSTEM AND COMMUNICATION METHOD THEREFOR
Publication number
20090010650
Publication date
Jan 8, 2009
Akihiko TSUCHIYA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Apparatus of adjusting optical signal transmission timing
Publication number
20080089685
Publication date
Apr 17, 2008
Tohru Kazawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE