Takafumi Ohtsuka

Person

Yokohama-shi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Optical module and method for manufacturing optical module
- Patent number 11,927,802
- Issue date Mar 12, 2024
- Sumitomo Electric Industries, Ltd.
- Eiichiro Yamada
- G02 - OPTICS
Information Patent Grant
Radiation device and emission cooling device
- Patent number 11,800,802
- Issue date Oct 24, 2023
- Sumitomo Electric Industries, Ltd.
- Takeshi Inoue
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
Optical connection structure
- Patent number 11,402,585
- Issue date Aug 2, 2022
- Sumitomo Electric Industries, Ltd.
- Masato Tanaka
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Optical fiber amplifier
- Patent number 11,088,504
- Issue date Aug 10, 2021
- Sumitomo Electric Industries, Ltd.
- Osamu Shimakawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Optical fiber sensor system for strain detection
- Patent number 10,429,235
- Issue date Oct 1, 2019
- Sumitomo Electric Industries, Ltd
- Takafumi Ohtsuka
- G01 - MEASURING TESTING
Information Patent Grant
Optical fiber sensor system having a polarization separator
- Patent number 10,184,788
- Issue date Jan 22, 2019
- Sumitomo Electric Industries, Ltd
- Takafumi Ohtsuka
- G02 - OPTICS
Information Patent Grant
Interferometric optical fiber sensor system and interferometric opt...
- Patent number 9,651,436
- Issue date May 16, 2017
- Sumitomo Electric Industries, Ltd
- Takafumi Ohtsuka
- G01 - MEASURING TESTING
Information Patent Grant
Optical path control device
- Patent number 9,606,296
- Issue date Mar 28, 2017
- Sumitomo Electric Industries, Ltd
- Takafumi Ohtsuka
- G02 - OPTICS
Information Patent Grant
Wavelength selector switch
- Patent number 9,482,822
- Issue date Nov 1, 2016
- Sumitomo Electric Industries, Ltd
- Masaki Suzuki
- G02 - OPTICS
Information Patent Grant
Wavelength selective switch
- Patent number 9,372,311
- Issue date Jun 21, 2016
- Sumitomo Electric Industries, Ltd
- Hidehisa Tazawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Wavelength selective switch and method of manufacturing same
- Patent number 9,326,050
- Issue date Apr 26, 2016
- Sumitomo Electric Industries, Ltd
- Masaki Suzuki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical unit and optical device
- Patent number 9,277,301
- Issue date Mar 1, 2016
- Sumitomo Electric Industries, Ltd
- Takafumi Ohtsuka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Wavelength selective switch
- Patent number 9,151,902
- Issue date Oct 6, 2015
- Sumitomo Electric Industries, Ltd
- Takafumi Ohtsuka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
OPTICAL FIBER AMPLIFIER AND RARE-EARTH ELEMENT DOPED MULTICORE OPTI...
- Publication number 20240322516
- Publication date Sep 26, 2024
- Sumitomo Electric Industries, Ltd.
- Takafumi OHTSUKA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
MODE-DEPENDENT LOSS MEASUREMENT DEVICE AND MODE-DEPENDENT LOSS MEAS...
- Publication number 20240011866
- Publication date Jan 11, 2024
- Sumitomo Electric Industries, Ltd.
- Takafumi OHTSUKA
- G01 - MEASURING TESTING
Information Patent Application
GAS LASER AND WASTE HEAT RECOVERY SYSTEM
- Publication number 20230378712
- Publication date Nov 23, 2023
- Sumitomo Electric Industries, Ltd.
- Takafumi OHTSUKA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
MULTI-CORE FIBER MODULE AND MULTI-CORE FIBER AMPLIFIER
- Publication number 20230275390
- Publication date Aug 31, 2023
- Sumitomo Electric Industries, Ltd.
- Takafumi OHTSUKA
- G02 - OPTICS
Information Patent Application
OPTICAL AMPLIFIER AND OPTICAL COMMUNICATION SYSTEM
- Publication number 20230006411
- Publication date Jan 5, 2023
- Sumitomo Electric Industries, Ltd.
- Takafumi OHTSUKA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
OPTICAL MODULE AND METHOD FOR MANUFACTURING OPTICAL MODULE
- Publication number 20210389525
- Publication date Dec 16, 2021
- Sumitomo Electric Industries, Ltd.
- Eiichiro YAMADA
- G02 - OPTICS
Information Patent Application
OPTICAL FIBER AMPLIFIER
- Publication number 20210242655
- Publication date Aug 5, 2021
- Sumitomo Electric Industries, Ltd.
- Takafumi OHTSUKA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
RADIATION DEVICE AND EMISSION COOLING DEVICE
- Publication number 20210151654
- Publication date May 20, 2021
- Sumitomo Electric Industries, Ltd.
- Takeshi INOUE
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Application
OPTICAL AMPLIFIER
- Publication number 20200381885
- Publication date Dec 3, 2020
- Sumitomo Electric Industries, Ltd.
- Takafumi OHTSUKA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
OPTICAL CONNECTION STRUCTURE
- Publication number 20200284988
- Publication date Sep 10, 2020
- Sumitomo Electric Industries, Ltd.
- Masato TANAKA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
OPTICAL FIBER AMPLIFIER
- Publication number 20190379174
- Publication date Dec 12, 2019
- Sumitomo Electric Industries, Ltd.
- Osamu SHIMAKAWA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
OPTICAL FIBER SENSOR SYSTEM
- Publication number 20170363461
- Publication date Dec 21, 2017
- Sumitomo Electric Industries, Ltd.
- Takafumi Ohtsuka
- G01 - MEASURING TESTING
Information Patent Application
OPTICAL FIBER SENSOR SYSTEM
- Publication number 20160238376
- Publication date Aug 18, 2016
- Sumitomo Electric Industries, Ltd.
- Takafumi Ohtsuka
- G02 - OPTICS
Information Patent Application
WAVELENGTH SELECTOR SWITCH
- Publication number 20160216452
- Publication date Jul 28, 2016
- Sumitomo Electric Industries, Ltd.
- Masaki SUZUKI
- G02 - OPTICS
Information Patent Application
OPTICAL PATH CONTROL DEVICE
- Publication number 20160124152
- Publication date May 5, 2016
- Sumitomo Electric Industries, Ltd.
- Takafumi Ohtsuka
- G02 - OPTICS
Information Patent Application
WAVELENGTH SELECTION SWITCH AND CONTROL METHOD FOR PHASE MODULATION...
- Publication number 20160124155
- Publication date May 5, 2016
- Sumitomo Electric Industries, Ltd.
- Takafumi Ohtsuka
- G02 - OPTICS
Information Patent Application
INTERFEROMETRIC OPTICAL FIBER SENSOR SYSTEM AND INTERFEROMETRIC OPT...
- Publication number 20160061672
- Publication date Mar 3, 2016
- Sumitomo Electric Industries, Ltd.
- Takafumi Ohtsuka
- G01 - MEASURING TESTING
Information Patent Application
OPTICAL DEVICE
- Publication number 20150286009
- Publication date Oct 8, 2015
- Sumitomo Electric Industries, Ltd.
- Takafumi Ohtsuka
- G02 - OPTICS
Information Patent Application
OPTICAL PATH CONTROL DEVICE
- Publication number 20150260920
- Publication date Sep 17, 2015
- Sumitomo Electric Industries, Ltd.
- Takafumi Ohtsuka
- G02 - OPTICS
Information Patent Application
OPTICAL UNIT AND OPTICAL DEVICE
- Publication number 20150098701
- Publication date Apr 9, 2015
- Sumitomo Electric Industries, Ltd.
- Takafumi OHTSUKA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
WAVELENGTH SELECTIVE SWITCH
- Publication number 20150078748
- Publication date Mar 19, 2015
- Sumitomo Electric Industries, Ltd.
- Hidehisa TAZAWA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
WAVELENGTH SELECTIVE SWITCH AND METHOD OF MANUFACTURING SAME
- Publication number 20150023662
- Publication date Jan 22, 2015
- Sumitomo Electric Industries, Ltd.
- Masaki SUZUKI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
WAVELENGTH SELECTIVE SWITCH
- Publication number 20140321796
- Publication date Oct 30, 2014
- Sumitomo Electric Industries, Ltd.
- Takafumi OHTSUKA
- G02 - OPTICS

Takafumi Ohtsuka

Person

Patents Grantslast 30 patents

Optical module and method for manufacturing optical module

Radiation device and emission cooling device

Optical connection structure

Optical fiber amplifier

Optical fiber sensor system for strain detection

Optical fiber sensor system having a polarization separator

Interferometric optical fiber sensor system and interferometric opt...

Optical path control device

Wavelength selector switch

Wavelength selective switch

Wavelength selective switch and method of manufacturing same

Optical unit and optical device

Wavelength selective switch

Patents Applicationslast 30 patents

OPTICAL FIBER AMPLIFIER AND RARE-EARTH ELEMENT DOPED MULTICORE OPTI...

MODE-DEPENDENT LOSS MEASUREMENT DEVICE AND MODE-DEPENDENT LOSS MEAS...

GAS LASER AND WASTE HEAT RECOVERY SYSTEM

MULTI-CORE FIBER MODULE AND MULTI-CORE FIBER AMPLIFIER

OPTICAL AMPLIFIER AND OPTICAL COMMUNICATION SYSTEM

OPTICAL MODULE AND METHOD FOR MANUFACTURING OPTICAL MODULE

OPTICAL FIBER AMPLIFIER

RADIATION DEVICE AND EMISSION COOLING DEVICE

OPTICAL AMPLIFIER

OPTICAL CONNECTION STRUCTURE

OPTICAL FIBER AMPLIFIER

OPTICAL FIBER SENSOR SYSTEM

OPTICAL FIBER SENSOR SYSTEM

WAVELENGTH SELECTOR SWITCH

OPTICAL PATH CONTROL DEVICE

WAVELENGTH SELECTION SWITCH AND CONTROL METHOD FOR PHASE MODULATION...

INTERFEROMETRIC OPTICAL FIBER SENSOR SYSTEM AND INTERFEROMETRIC OPT...

OPTICAL DEVICE

OPTICAL PATH CONTROL DEVICE

OPTICAL UNIT AND OPTICAL DEVICE

WAVELENGTH SELECTIVE SWITCH

WAVELENGTH SELECTIVE SWITCH AND METHOD OF MANUFACTURING SAME

WAVELENGTH SELECTIVE SWITCH