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Kanagawa-ken, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Signal detection apparatus, signal detection method and program
Patent number
12,176,952
Issue date
Dec 24, 2024
Nippon Telegraph and Telephone Corporation
Koki Shibahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmitter
Patent number
12,170,542
Issue date
Dec 17, 2024
Nippon Telegraph and Telephone Corporation
Hiroto Kawakami
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Amplifying fiber and optical amplifier
Patent number
12,099,235
Issue date
Sep 24, 2024
Nippon Telegraph and Telephone Corporation
Hirotaka Ono
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Light amplifying relay system
Patent number
12,034,269
Issue date
Jul 9, 2024
Nippon Telegraph and Telephone Corporation
Takayuki Mizuno
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Wavelength dispersion compensation apparatus and wavelength dispers...
Patent number
11,929,784
Issue date
Mar 12, 2024
Nippon Telegraph and Telephone Corporation
Shimpei Shimizu
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system, optical transmission apparatus and opt...
Patent number
11,888,584
Issue date
Jan 30, 2024
Nippon Telegraph and Telephone Corporation
Koki Shibahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system and optical transmission method
Patent number
11,888,522
Issue date
Jan 30, 2024
Nippon Telegraph and Telephone Corporation
Koki Shibahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Multimode optical amplifier
Patent number
11,888,281
Issue date
Jan 30, 2024
Nippon Telegraph and Telephone Corporation
Hirotaka Ono
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Optical signal processing apparatus, optical signal processing meth...
Patent number
11,770,205
Issue date
Sep 26, 2023
Nippon Telegraph and Telephone Corporation
Koki Shibahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Wavelength dispersion amount calculation apparatus and wavelength d...
Patent number
11,742,950
Issue date
Aug 29, 2023
Nippon Telegraph and Telephone Corporation
Shimpei Shimizu
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmitting system and optical transmitting method
Patent number
11,716,144
Issue date
Aug 1, 2023
Nippon Telegraph and Telephone Corporation
Shimpei Shimizu
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Signal processing method, signal processing apparatus and communica...
Patent number
11,632,185
Issue date
Apr 18, 2023
Nippon Telegraph and Telephone Corporation
Takayuki Kobayashi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
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
Optical repeater
Patent number
11,438,071
Issue date
Sep 6, 2022
Nippon Telegraph and Telephone Corporation
Hirotaka Ono
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Signal generation device
Patent number
11,438,083
Issue date
Sep 6, 2022
Nippon Telegraph and Telephone Corporation
Hiroshi Yamazaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical node device
Patent number
11,362,753
Issue date
Jun 14, 2022
Nippon Telegraph and Telephone Corporation
Hirotaka Ono
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Crosstalk estimation system
Patent number
11,349,564
Issue date
May 31, 2022
Nippon Telegraph and Telephone Corporation
Akira Isoda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmitting system, optical transmitting apparatus, optica...
Patent number
11,283,527
Issue date
Mar 22, 2022
Nippon Telegraph and Telephone Corporation
Masanori Nakamura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical modulator
Patent number
11,194,219
Issue date
Dec 7, 2021
Nippon Telegraph and Telephone Corporation
Hiroto Kawakami
G02 - OPTICS
Information
Patent Grant
Optical amplification system and optical amplification method
Patent number
11,108,208
Issue date
Aug 31, 2021
Nippon Telegraph and Telephone Corporation
Takuya Oda
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Optical transmission system and optical transmission method
Patent number
11,101,914
Issue date
Aug 24, 2021
Nippon Telegraph and Telephone Corporation
Koki Shibahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
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 node device
Patent number
10,965,375
Issue date
Mar 30, 2021
Nippon Telegraph and Telephone Corporation
Hirotaka Ono
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Transmission quality estimation system, transmission quality estima...
Patent number
10,686,520
Issue date
Jun 16, 2020
Nippon Telegraph and Telephone Corporation
Takuya Oda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Transmission quality estimation system, transmission quality estima...
Patent number
10,637,568
Issue date
Apr 28, 2020
Nippon Telegraph and Telephone Corporation
Takuya Oda
G02 - OPTICS
Information
Patent Grant
Communication system and fault detection method
Patent number
10,615,868
Issue date
Apr 7, 2020
Nippon Telegraph and Telephone Corporation
Takuya Oda
G02 - OPTICS
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
Communication system and connector
Patent number
10,527,781
Issue date
Jan 7, 2020
Nippon Telegraph and Telephone Corporation
Takuya Oda
C03 - GLASS MINERAL OR SLAG WOOL
Information
Patent Grant
Communication system and fault location specifying method
Patent number
10,511,381
Issue date
Dec 17, 2019
Nippon Telegraph and Telephone Corporation
Takuya Oda
G02 - OPTICS
Patents Applications
last 30 patents
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM, TRANSMITTER, AND CONTROL METHOD
Publication number
20240413922
Publication date
Dec 12, 2024
Nippon Telegraph and Telephone Corporation
Akira KAWAI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
SIGNAL DETECTION DEVICE, SIGNAL DETECTION METHOD, AND PROGRAM
Publication number
20240388376
Publication date
Nov 21, 2024
Nippon Telegraph and Telephone Corporation
Koki SHIBAHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
SIGNAL PROCESSING APPARATUS, SIGNAL PROCESSING METHOD AND COMMUNICA...
Publication number
20240267129
Publication date
Aug 8, 2024
Nippon Telegraph and Telephone Corporation
Masanori NAKAMURA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
WAVEGUIDE ESTIMATION APPARATUS, WAVEGUIDE ESTIMATION METHOD AND PRO...
Publication number
20240259095
Publication date
Aug 1, 2024
Nippon Telegraph and Telephone Corporation
Akira KAWAI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL AMPLIFICATION APPARATUS AND OPTICAL AMPLIFICATION METHOD
Publication number
20240248369
Publication date
Jul 25, 2024
Nippon Telegraph and Telephone Corporation
Shimpei SHIMIZU
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL AMPLIFICATION SYSTEM, OPTICAL AMPLIFICATION APPARATUS AND O...
Publication number
20240250768
Publication date
Jul 25, 2024
Nippon Telegraph and Telephone Corporation
Shimpei SHIMIZU
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
POWER CONVERSION APPARATUS CAPABLE OF CONTROLLING POWER CONVERSION...
Publication number
20240088793
Publication date
Mar 14, 2024
Panasonic Intellectual Property Management Co., Ltd.
Takehiko YAMAKAWA
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
ELECTRIC POWER CONVERSION APPARATUS CAPABLE OF CONTROLLING POWER CO...
Publication number
20240055995
Publication date
Feb 15, 2024
Panasonic Intellectual Property Management Co., Ltd.
Takehiko YAMAKAWA
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Application
SIGNAL DETECTOR, CARRIER PHASE RETRIEVAL APPARATUS, CARRIER PHASE R...
Publication number
20230421267
Publication date
Dec 28, 2023
Nippon Telegraph and Telephone Corporation
Koki SHIBAHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMITTER
Publication number
20230261755
Publication date
Aug 17, 2023
Nippon Telegraph and Telephone Corporation
Hiroto KAWAKAMI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
SIGNAL DETECTION APPARATUS, SIGNAL DETECTION METHOD AND PROGRAM
Publication number
20230216589
Publication date
Jul 6, 2023
Nippon Telegraph and Telephone Corporation
Koki SHIBAHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM AND OPTICAL TRANSMISSION METHOD
Publication number
20230057448
Publication date
Feb 23, 2023
Nippon Telegraph and Telephone Corporation
Koki SHIBAHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
WAVELENGTH DISPERSION COMPENSATION APPARATUS AND WAVELENGTH DISPERS...
Publication number
20230059003
Publication date
Feb 23, 2023
Nippon Telegraph and Telephone Corporation
Shimpei SHIMIZU
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM, OPTICAL TRANSMISSION APPARATUS AND OPT...
Publication number
20230054203
Publication date
Feb 23, 2023
Nippon Telegraph and Telephone Corporation
Koki SHIBAHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
TRANSFORMER INCLUDING FIRST AND SECOND WINDINGS, AND FIRST AND SECO...
Publication number
20230028214
Publication date
Jan 26, 2023
Panasonic Intellectual Property Management Co., Ltd.
Takehiko YAMAKAWA
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
WAVELENGTH DISPERSION AMOUNT CALCULATION APPARATUS AND WAVELENGTH D...
Publication number
20220407600
Publication date
Dec 22, 2022
Nippon Telegraph and Telephone Corporation
Shimpei SHIMIZU
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMITTING SYSTEM AND OPTICAL TRANSMITTING METHOD
Publication number
20220399940
Publication date
Dec 15, 2022
Nippon Telegraph and Telephone Corporation
Shimpei SHIMIZU
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL SIGNAL PROCESSING APPARATUS, OPTICAL SIGNAL PROCESSING METH...
Publication number
20220329343
Publication date
Oct 13, 2022
Nippon Telegraph and Telephone Corporation
Koki SHIBAHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Mode Equalization Filter
Publication number
20220317349
Publication date
Oct 6, 2022
Nippon Telegraph and Telephone Corporation
Hirotaka Ono
G02 - OPTICS
Information
Patent Application
SIGNAL PROCESSING METHOD, SIGNAL PROCESSING APPARATUS AND COMMUNICA...
Publication number
20220149974
Publication date
May 12, 2022
Nippon Telegraph and Telephone Corporation
Takayuki KOBAYASHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
AMPLIFYING FIBER AND OPTICAL AMPLIFIER
Publication number
20220120960
Publication date
Apr 21, 2022
Nippon Telegraph and Telephone Corporation
Hirotaka ONO
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Optical Repeater
Publication number
20220045759
Publication date
Feb 10, 2022
Hirotaka Ono
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMITTING SYSTEM, OPTICAL TRANSMITTING APPARATUS, OPTICA...
Publication number
20220029707
Publication date
Jan 27, 2022
Nippon Telegraph and Telephone Corporation
Masanori NAKAMURA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION NODE
Publication number
20220014301
Publication date
Jan 13, 2022
Nippon Telegraph and Telephone Corporation
Kazunori SENOO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
CROSSTALK ESTIMATION SYSTEM
Publication number
20210376924
Publication date
Dec 2, 2021
Nippon Telegraph and Telephone Corporation
Akira ISODA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Signal Generation Device
Publication number
20210320735
Publication date
Oct 14, 2021
Nippon Telegraph and Telephone Corporation
Hiroshi Yamazaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
LIGHT AMPLIFYING RELAY SYSTEM
Publication number
20210296847
Publication date
Sep 23, 2021
Nippon Telegraph and Telephone Corporation
Takayuki MIZUNO
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Mode Equalization Filter
Publication number
20210263214
Publication date
Aug 26, 2021
Nippon Telegraph and Telephone Corporation
Hirotaka Ono
G02 - OPTICS
Information
Patent Application
Multimode Optical Amplifier
Publication number
20210257802
Publication date
Aug 19, 2021
Nippon Telegraph and Telephone Corporation
Hirotaka Ono
H01 - BASIC ELECTRIC ELEMENTS
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