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Yasushi Hara
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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Optical transfer system, optical transmitter, and optical communica...
Patent number
11,626,925
Issue date
Apr 11, 2023
NEC Corporation
Yasushi Hara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Test controller, optical wavelength multiplexing transmission appar...
Patent number
10,998,998
Issue date
May 4, 2021
NEC Corporation
Yasushi Hara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Band identifying circuit, wavelength-multiplexed optical signal tra...
Patent number
10,567,105
Issue date
Feb 18, 2020
NEC Corporation
Yasushi Hara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical communication system, optical receiver, optical receiver co...
Patent number
10,320,483
Issue date
Jun 11, 2019
NEC Corporation
Yasushi Hara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical communication system, optical receiver, optical receiver co...
Patent number
10,009,102
Issue date
Jun 26, 2018
NEC Corporation
Yasushi Hara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Circuit for preventing transmission of a fixed pattern of optical d...
Patent number
6,947,674
Issue date
Sep 20, 2005
NEC Corporation
Yasushi Hara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Bit rate converter with controlled stuffing rate
Patent number
6,885,681
Issue date
Apr 26, 2005
NEC Corporation
Hiroaki Tanaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Dummy bit elimination device and coding apparatus for FEC code word
Patent number
6,657,967
Issue date
Dec 2, 2003
NEC Corporation
Takanori Fujisawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical communication network system with wavelength-based signal d...
Patent number
6,081,357
Issue date
Jun 27, 2000
NEC Corporation
Yasushi Hara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical branching apparatus and transmission line setting method th...
Patent number
5,822,474
Issue date
Oct 13, 1998
NEC Corporation
Yasushi Hara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
OPTICAL RECEIVER, OPTICAL TRANSMITTER, AND OPTICAL RECEPTION METHOD
Publication number
20240113777
Publication date
Apr 4, 2024
NEC Corporation
Yasushi HARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSFER SYSTEM, OPTICAL TRANSMITTER, AND OPTICAL COMMUNICA...
Publication number
20220190925
Publication date
Jun 16, 2022
NEC Corporation
Yasushi HARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMITTER AND OPTICAL RECEIVER
Publication number
20210359764
Publication date
Nov 18, 2021
NEC Corporation
Yasushi HARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL RECEIVER, OPTICAL TRANSMISSION SYSTEM, SUBMARINE OPTICAL CA...
Publication number
20200295844
Publication date
Sep 17, 2020
NEC Corporation
Yasushi HARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
TEST CONTROLLER, OPTICAL WAVELENGTH MULTIPLEXING TRANSMISSION APPAR...
Publication number
20200099462
Publication date
Mar 26, 2020
NEC Corporation
Yasushi HARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
BAND IDENTIFYING CIRCUIT, WAVELENGTH-MULTIPLEXED OPTICAL SIGNAL TRA...
Publication number
20190036636
Publication date
Jan 31, 2019
NEC Corporation
Yasushi HARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION SYSTEM, OPTICAL RECEIVER, OPTICAL RECEIVER CO...
Publication number
20180351644
Publication date
Dec 6, 2018
NEC Corporation
Yasushi HARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
TRANSMISSION CIRCUIT, RECEPTION CIRCUIT, OPTICAL TRANSFER SYSTEM, A...
Publication number
20170353258
Publication date
Dec 7, 2017
NEC Corporation
Yasushi HARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION SYSTEM, OPTICAL RECEIVER, OPTICAL RECEIVER CO...
Publication number
20160164610
Publication date
Jun 9, 2016
NEC Corporation
Yasushi HARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Circuit for preventing transmission of a fixed pattern of optical d...
Publication number
20010053010
Publication date
Dec 20, 2001
NEC Corporation
Yasushi Hara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Bit rate converter with controlled stuffing rate
Publication number
20010021201
Publication date
Sep 13, 2001
Hiroaki Tanaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE