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Kohki Shibahara
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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Signal separating apparatus and signal separating method
Patent number
11,552,714
Issue date
Jan 10, 2023
Nippon Telegraph and Telephone Corporation
Kohki Shibahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optically amplified repeater system and optical amplifier
Patent number
11,476,635
Issue date
Oct 18, 2022
Nippon Telegraph and Telephone Corporation
Takayuki Mizuno
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Signal separating apparatus and signal separating method
Patent number
10,985,846
Issue date
Apr 20, 2021
Nippon Telegraph and Telephone Corporation
Kohki Shibahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system, optical transmission apparatus, and op...
Patent number
10,536,238
Issue date
Jan 14, 2020
Nippon Telegraph and Telephone Corporation
Kohki Shibahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Multi-flow optical transceiver, multi-flow optical transponder and...
Patent number
9,762,982
Issue date
Sep 12, 2017
Nippon Telegraph and Telephone Corporation
Kazushige Yonenaga
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical receiving device and phase cycle reduction method
Patent number
9,667,350
Issue date
May 30, 2017
Nippon Telegraph and Telephone Corporation
Kengo Horikoshi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Multi-flow optical transceiver, multi-flow optical transponder and...
Patent number
9,326,049
Issue date
Apr 26, 2016
Nippon Telegraph and Telephone Corporation
Kazushige Yonenaga
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
Signal Separating Apparatus And Signal Separating Method
Publication number
20210218477
Publication date
Jul 15, 2021
Nippon Telegraph and Telephone Corporation
Kohki SHIBAHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICALLY AMPLIFIED REPEATER SYSTEM AND OPTICAL AMPLIFIER
Publication number
20200381888
Publication date
Dec 3, 2020
Nippon Telegraph and Telephone Corporation
Takayuki MIZUNO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
SIGNAL SEPARATING APPARATUS AND SIGNAL SEPARATING METHOD
Publication number
20200014469
Publication date
Jan 9, 2020
Nippon Telegraph and Telephone Corporation
Kohki SHIBAHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM, OPTICAL TRANSMISSION APPARATUS, AND OP...
Publication number
20180375607
Publication date
Dec 27, 2018
Nippon Telegraph and Telephone Corporation
Kohki SHIBAHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
MULTI-FLOW OPTICAL TRANSCEIVER, MULTI-FLOW OPTICAL TRANSPONDER AND...
Publication number
20160205451
Publication date
Jul 14, 2016
Nippon Telegraph and Telephone Corporation
Kazushige YONENAGA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL RECEIVING DEVICE AND PHASE CYCLE REDUCTION METHOD
Publication number
20150333838
Publication date
Nov 19, 2015
Nippon Telegraph and Telephone Corporation
Kengo HORIKOSHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
MULTI-FLOW OPTICAL TRANSCEIVER, MULTI-FLOW OPTICAL TRANSPONDER AND...
Publication number
20140126905
Publication date
May 8, 2014
Nippon Telegraph and Telephone Corporation
Kazushige Yonenaga
H04 - ELECTRIC COMMUNICATION TECHNIQUE