Keita Yamaguchi

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Optical and electronic integrated switch
- Patent number 12,107,762
- Issue date Oct 1, 2024
- Nippon Telegraph and Telephone Corporation
- Osamu Moriwaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical waveguide
- Patent number 12,092,870
- Issue date Sep 17, 2024
- Nippon Telegraph and Telephone Corporation
- Takashi Go
- G02 - OPTICS
Information Patent Grant
Optical signal processing apparatus and manufacturing method thereof
- Patent number 12,032,231
- Issue date Jul 9, 2024
- Nippon Telegraph and Telephone Corporation
- Keita Yamaguchi
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Optical signal processing apparatus
- Patent number 12,022,246
- Issue date Jun 25, 2024
- Nippon Telegraph and Telephone Corporation
- Keita Yamaguchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical signal processing apparatus
- Patent number 12,007,665
- Issue date Jun 11, 2024
- Nippon Telegraph and Telephone Corporation
- Keita Yamaguchi
- G02 - OPTICS
Information Patent Grant
Optical module
- Patent number 11,977,315
- Issue date May 7, 2024
- Nippon Telegraph and Telephone Corporation
- Ai Yanagihara
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Optical and electronic integrated switch
- Patent number 11,979,694
- Issue date May 7, 2024
- Nippon Telegraph and Telephone Corporation
- Osamu Moriwaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical and electronic integrated switch
- Patent number 11,930,309
- Issue date Mar 12, 2024
- Nippon Telegraph and Telephone Corporation
- Keita Yamaguchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical and electronic integrated switch and optical network system
- Patent number 11,881,897
- Issue date Jan 23, 2024
- Nippon Telegraph and Telephone Corporation
- Hideki Nishizawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical module and manufacturing method thereof
- Patent number 11,740,491
- Issue date Aug 29, 2023
- Nippon Telegraph and Telephone Corporation
- Ai Yanagihara
- G02 - OPTICS
Information Patent Grant
Distance measurement device, head-mounted display device, mobile in...
- Patent number 11,422,372
- Issue date Aug 23, 2022
- MAXELL, LTD.
- Keita Yamaguchi
- G02 - OPTICS
Information Patent Grant
Optical signal processing device and method for controlling same
- Patent number 11,405,702
- Issue date Aug 2, 2022
- Nippon Telegraph and Telephone Corporation
- Keita Yamaguchi
- G02 - OPTICS
Information Patent Grant
Cache memory and method for controlling the same
- Patent number 11,216,371
- Issue date Jan 4, 2022
- Mitsubishi Electric Corporation
- Keita Yamaguchi
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Optical switch array and multicast switch
- Patent number 11,194,093
- Issue date Dec 7, 2021
- Nippon Telegraph and Telephone Corporation
- Kazunori Senoo
- G02 - OPTICS
Information Patent Grant
Variable wavelength filter
- Patent number 11,112,561
- Issue date Sep 7, 2021
- Nippon Telegraph and Telephone Corporation
- Kenya Suzuki
- G02 - OPTICS
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
Imaging device, imaging method, and image processing device generat...
- Patent number 10,951,793
- Issue date Mar 16, 2021
- Hitachi, Ltd.
- Yusuke Nakamura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Distance measurement device and distance measurement method
- Patent number 10,887,504
- Issue date Jan 5, 2021
- Hitachi, Ltd.
- Keita Yamaguchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical signal processing device
- Patent number 10,797,817
- Issue date Oct 6, 2020
- Nippon Telegraph and Telephone Corporation
- Kazunori Seno
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Language conversion apparatus, language conversion method, and lang...
- Patent number 9,946,710
- Issue date Apr 17, 2018
- Softbank Corp.
- Keita Yamaguchi
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Optical input/output device
- Patent number 9,588,300
- Issue date Mar 7, 2017
- Nippon Telegraph and Telephone Corporation
- Mitsumasa Nakajima
- G02 - OPTICS
Information Patent Grant
Packing sheet
- Patent number 9,346,928
- Issue date May 24, 2016
- Sumitomo Bakelite Co., Ltd.
- Keita Yamaguchi
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Grant
Communications control system for elevators
- Patent number 6,450,298
- Issue date Sep 17, 2002
- Mitsubishi Denki Kabushiki Kaisha
- Kunikazu Koura
- B66 - HOISTING LIFTING HAULING

Patents Applicationslast 30 patents

Information Patent Application
Waveguide-Type Optical Coupler
- Publication number 20250020865
- Publication date Jan 16, 2025
- Nippon Telegraph and Telephone Corporation
- Takashi Go
- G02 - OPTICS
Information Patent Application
OPTICAL AND ELECTRONIC INTEGRATED SWITCH
- Publication number 20240422097
- Publication date Dec 19, 2024
- Nippon Telegraph and Telephone Corporation
- Osamu Moriwaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical Phase Shifter, Optical Switch and 90 Degrees Optical Hybrid
- Publication number 20240201521
- Publication date Jun 20, 2024
- Nippon Telegraph and Telephone Corporation
- Takashi Go
- G02 - OPTICS
Information Patent Application
Control Device for Computer Device
- Publication number 20240192663
- Publication date Jun 13, 2024
- Nippon Telegraph and Telephone Corporation
- Kenya Suzuki
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Manufacturing Apparatus of Optical Circuit and Manufacturing Method...
- Publication number 20240085627
- Publication date Mar 14, 2024
- Nippon Telegraph and Telephone Corporation
- Kenya Suzuki
- G02 - OPTICS
Information Patent Application
Probe Card and Method of Manufacturing Thereof
- Publication number 20240044941
- Publication date Feb 8, 2024
- Nippon Telegraph and Telephone Corporation
- Ai Yanagihara
- G01 - MEASURING TESTING
Information Patent Application
Photomask, Optical-Waveguide, Optical Circuit and Method of Manufac...
- Publication number 20230259017
- Publication date Aug 17, 2023
- Nippon Telegraph and Telephone Corporation
- Takashi Go
- G02 - OPTICS
Information Patent Application
Optical Circuit
- Publication number 20230251422
- Publication date Aug 10, 2023
- Nippon Telegraph and Telephone Corporation
- Masashi Ota
- G02 - OPTICS
Information Patent Application
Optical and Electronic Integrated Switch
- Publication number 20230136142
- Publication date May 4, 2023
- Nippon Telegraph and Telephone Corporation
- Osamu Moriwaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical and Electronic Integrated Switch and Optical Network System
- Publication number 20230082854
- Publication date Mar 16, 2023
- Nippon Telegraph and Telephone Corporation
- Hideki Nishizawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical and Electronic Integrated Switch
- Publication number 20230073384
- Publication date Mar 9, 2023
- Nippon Telegraph and Telephone Corporation
- Osamu Moriwaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical and Electronic Integrated Switch
- Publication number 20230060777
- Publication date Mar 2, 2023
- Nippon Telegraph and Telephone Corporation
- Keita Yamaguchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical Waveguide
- Publication number 20230032684
- Publication date Feb 2, 2023
- Nippon Telegraph and Telephone Corporation
- Takashi Go
- G02 - OPTICS
Information Patent Application
Optical Waveguide
- Publication number 20220413218
- Publication date Dec 29, 2022
- Nippon Telegraph and Telephone Corporation
- Takashi Go
- G02 - OPTICS
Information Patent Application
Optical Module and Manufacturing Method Thereof
- Publication number 20220357601
- Publication date Nov 10, 2022
- Nippon Telegraph and Telephone Corporation
- Ai Yanagihara
- G02 - OPTICS
Information Patent Application
Optical Signal Processing Apparatus
- Publication number 20220272427
- Publication date Aug 25, 2022
- Nippon Telegraph and Telephone Corporation
- Keita Yamaguchi
- G02 - OPTICS
Information Patent Application
Optical Signal Processing Apparatus
- Publication number 20220091473
- Publication date Mar 24, 2022
- Nippon Telegraph and Telephone Corporation
- Keita Yamaguchi
- G02 - OPTICS
Information Patent Application
Optical Signal Processing Apparatus and Manufacturing Method Thereof
- Publication number 20220066244
- Publication date Mar 3, 2022
- Nippon Telegraph and Telephone Corporation
- Keita Yamaguchi
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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
Optical Module
- Publication number 20210397065
- Publication date Dec 23, 2021
- Nippon Telegraph and Telephone Corporation
- Ai Yanagihara
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Optical Signal Processing Device and Method For Controlling Same
- Publication number 20210258663
- Publication date Aug 19, 2021
- Nippon Telegraph and Telephone Corporation
- Keita Yamaguchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Variable Wavelength Filter
- Publication number 20210141153
- Publication date May 13, 2021
- Nippon Telegraph and Telephone Corporation
- Kenya Suzuki
- G02 - OPTICS
Information Patent Application
DISTANCE MEASUREMENT DEVICE, HEAD-MOUNTED DISPLAY DEVICE, MOBILE IN...
- Publication number 20210132382
- Publication date May 6, 2021
- Maxell, Ltd.
- Keita YAMAGUCHI
- G01 - MEASURING TESTING
Information Patent Application
OPTICAL NODE DEVICE
- Publication number 20210036781
- Publication date Feb 4, 2021
- Nippon Telegraph and Telephone Corporation
- Hirotaka ONO
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL SWITCH ARRAY AND MULTICAST SWITCH
- Publication number 20200408990
- Publication date Dec 31, 2020
- Nippon Telegraph and Telephone Corporation
- Kazunori Senoo
- G02 - OPTICS
Information Patent Application
Cache Memory and Method for Controlling the Same
- Publication number 20200019499
- Publication date Jan 16, 2020
- MITSUBISHI ELECTRIC CORPORATION
- Keita YAMAGUCHI
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Optical Signal Processing Device
- Publication number 20190349112
- Publication date Nov 14, 2019
- Nippon Telegraph and Telephone Corporation
- Kazunori Seno
- G02 - OPTICS
Information Patent Application
IMAGING DEVICE, IMAGING METHOD, AND IMAGE PROCESSING DEVICE
- Publication number 20190268507
- Publication date Aug 29, 2019
- Hitachi, Ltd
- Yusuke NAKAMURA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
DISTANCE MEASUREMENT DEVICE AND DISTANCE MEASUREMENT METHOD
- Publication number 20190182430
- Publication date Jun 13, 2019
- Hitachi, Ltd
- Keita YAMAGUCHI
- G02 - OPTICS
Information Patent Application
LANGUAGE CONVERSION APPARATUS, LANGUAGE CONVERSION METHOD, AND LANG...
- Publication number 20170091180
- Publication date Mar 30, 2017
- SOFTBANK CORP.
- Keita YAMAGUCHI
- G06 - COMPUTING CALCULATING COUNTING

Keita Yamaguchi

Person

Patents Grantslast 30 patents

Optical and electronic integrated switch

Optical waveguide

Optical signal processing apparatus and manufacturing method thereof

Optical signal processing apparatus

Optical signal processing apparatus

Optical module

Optical and electronic integrated switch

Optical and electronic integrated switch

Optical and electronic integrated switch and optical network system

Optical module and manufacturing method thereof

Distance measurement device, head-mounted display device, mobile in...

Optical signal processing device and method for controlling same

Cache memory and method for controlling the same

Optical switch array and multicast switch

Variable wavelength filter

Optical node device

Imaging device, imaging method, and image processing device generat...

Distance measurement device and distance measurement method

Optical signal processing device

Language conversion apparatus, language conversion method, and lang...

Optical input/output device

Packing sheet

Communications control system for elevators

Patents Applicationslast 30 patents

Waveguide-Type Optical Coupler

OPTICAL AND ELECTRONIC INTEGRATED SWITCH

Optical Phase Shifter, Optical Switch and 90 Degrees Optical Hybrid

Control Device for Computer Device

Manufacturing Apparatus of Optical Circuit and Manufacturing Method...

Probe Card and Method of Manufacturing Thereof

Photomask, Optical-Waveguide, Optical Circuit and Method of Manufac...

Optical Circuit

Optical and Electronic Integrated Switch

Optical and Electronic Integrated Switch and Optical Network System

Optical and Electronic Integrated Switch

Optical and Electronic Integrated Switch

Optical Waveguide

Optical Waveguide

Optical Module and Manufacturing Method Thereof

Optical Signal Processing Apparatus

Optical Signal Processing Apparatus

Optical Signal Processing Apparatus and Manufacturing Method Thereof

OPTICAL COMMUNICATION NODE

Optical Module

Optical Signal Processing Device and Method For Controlling Same

Variable Wavelength Filter

DISTANCE MEASUREMENT DEVICE, HEAD-MOUNTED DISPLAY DEVICE, MOBILE IN...

OPTICAL NODE DEVICE

OPTICAL SWITCH ARRAY AND MULTICAST SWITCH

Cache Memory and Method for Controlling the Same

Optical Signal Processing Device

IMAGING DEVICE, IMAGING METHOD, AND IMAGE PROCESSING DEVICE

DISTANCE MEASUREMENT DEVICE AND DISTANCE MEASUREMENT METHOD

LANGUAGE CONVERSION APPARATUS, LANGUAGE CONVERSION METHOD, AND LANG...