Akira YOSHIKAWA

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Nitride semiconductor element, nitride semiconductor light emitting...
- Patent number 11,637,221
- Issue date Apr 25, 2023
- Asahi Kasei Kabushiki Kaisha
- Aya Yokoyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Nitride semiconductor element, nitride semiconductor light emitting...
- Patent number 10,937,928
- Issue date Mar 2, 2021
- Asahi Kasei Kabushiki Kaisha
- Aya Yokoyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Nitride semiconductor substrate and method for manufacturing same
- Patent number 10,734,225
- Issue date Aug 4, 2020
- Asahi Kasei Kabushiki Kaisha
- Akira Yoshikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
MSM ultraviolet ray receiving element, MSM ultraviolet ray receivin...
- Patent number 10,424,684
- Issue date Sep 24, 2019
- Asahi Kasei Kabushiki Kaisha
- Akira Yoshikawa
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
NITRIDE SEMICONDUCTOR ELEMENT, NITRIDE SEMICONDUCTOR LIGHT EMITTING...
- Publication number 20210119083
- Publication date Apr 22, 2021
- Asahi Kasei Kabushiki Kaisha
- Aya YOKOYAMA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
NITRIDE SEMICONDUCTOR SUBSTRATE AND METHOD FOR MANUFACTURING SAME
- Publication number 20190355571
- Publication date Nov 21, 2019
- Asahi Kasei Kabushiki Kaisha
- Akira Yoshikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
NITRIDE SEMICONDUCTOR ELEMENT, NITRIDE SEMICONDUCTOR LIGHT EMITTING...
- Publication number 20190140141
- Publication date May 9, 2019
- Asahi Kasei Kabushiki Kaisha
- Aya YOKOYAMA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
MSM ULTRAVIOLET RAY RECEIVING ELEMENT, MSM ULTRAVIOLET RAY RECEIVIN...
- Publication number 20180358500
- Publication date Dec 13, 2018
- Asahi Kasei Kabushiki Kaisha
- Akira YOSHIKAWA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
COMPOUND SEMICONDUCTOR STACK AND SEMICONDUCTOR DEVICE
- Publication number 20160035839
- Publication date Feb 4, 2016
- ASAHI KASEI MICRODEVICES CORPORATION
- Akira YOSHIKAWA
- H01 - BASIC ELECTRIC ELEMENTS