Masahiko Yamakawa

Person

Kanagawa-ken, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Method for using white light source, and white light source
- Patent number 12,072,069
- Issue date Aug 27, 2024
- SEOUL SEMICONDUCTOR CO., LTD.
- Masahiko Yamakawa
- F21 - LIGHTING
Information Patent Grant
Light source for myopia prevention article and method of using ligh...
- Patent number 12,023,513
- Issue date Jul 2, 2024
- Toshiba Materials Co., Ltd.
- Masahiko Yamakawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
White light source system
- Patent number 11,978,726
- Issue date May 7, 2024
- Seoul Semiconductor Co., Ltd.
- Masahiko Yamakawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
White light source system
- Patent number 11,721,675
- Issue date Aug 8, 2023
- Seoul Semiconductor Co., Ltd.
- Masahiko Yamakawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
White light source system
- Patent number 11,430,771
- Issue date Aug 30, 2022
- SEOUL SEMICONDUCTOR CO., LTD.
- Masahiko Yamakawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
White light source system
- Patent number 11,094,679
- Issue date Aug 17, 2021
- Kabushiki Kaisha Toshiba
- Masahiko Yamakawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Europium-activated alkaline-earth chloroapatite phosphor and light-...
- Patent number 11,084,979
- Issue date Aug 10, 2021
- Toshiba Materials Co., Ltd.
- Naotoshi Matsuda
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Light source for myopia prevention article and method of using ligh...
- Patent number 11,007,375
- Issue date May 18, 2021
- Toshiba Materials Co., Ltd.
- Masahiko Yamakawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
White light source system
- Patent number 10,674,577
- Issue date Jun 2, 2020
- Kabushiki Kaisha Toshiba
- Masahiko Yamakawa
- F21 - LIGHTING
Information Patent Grant
White light source system
- Patent number 10,473,274
- Issue date Nov 12, 2019
- Kabushiki Kaisha Toshiba
- Masahiko Yamakawa
- F21 - LIGHTING
Information Patent Grant
White light source and white light source system
- Patent number 10,420,183
- Issue date Sep 17, 2019
- Kabushiki Kaisha Toshiba
- Masahiko Yamakawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Illumination system for reproducing the color temperature range of...
- Patent number 10,378,709
- Issue date Aug 13, 2019
- Kabushiki Kaisha Toshiba
- Yasuhiro Shirakawa
- F21 - LIGHTING
Information Patent Grant
White light source system
- Patent number 10,375,786
- Issue date Aug 6, 2019
- Kabushiki Kaisha Toshiba
- Masahiko Yamakawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Light emitting device and LED light bulb
- Patent number 10,368,408
- Issue date Jul 30, 2019
- Toshiba Materials Co., Ltd.
- Hiroyasu Kondo
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Light emitting device and LED light bulb
- Patent number 10,368,409
- Issue date Jul 30, 2019
- Toshiba Materials Co., Ltd.
- Hiroyasu Kondo
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
White light source system
- Patent number 10,231,305
- Issue date Mar 12, 2019
- Kabushiki Kaisha Toshiba
- Masahiko Yamakawa
- F21 - LIGHTING
Information Patent Grant
White light source and white light source system including the same
- Patent number 9,605,815
- Issue date Mar 28, 2017
- Kabushiki Kaisha Toshiba
- Masahiko Yamakawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
White light source and white light source system including the same
- Patent number 9,551,467
- Issue date Jan 24, 2017
- Kabushiki Kaisha Toshiba
- Masahiko Yamakawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
LED light bulb
- Patent number 9,228,718
- Issue date Jan 5, 2016
- Kabushiki Kaisha Toshiba
- Yasumasa Ooya
- F21 - LIGHTING
Information Patent Grant
White light source
- Patent number 9,115,855
- Issue date Aug 25, 2015
- Kabushiki Kaisha Toshiba
- Tatsunori Itoga
- F21 - LIGHTING
Information Patent Grant
White light source and white light source system including the same
- Patent number 9,112,120
- Issue date Aug 18, 2015
- Kabushiki Kaisha Toshiba
- Masahiko Yamakawa
- F21 - LIGHTING
Information Patent Grant
White light source and white light source system including the same
- Patent number 9,109,762
- Issue date Aug 18, 2015
- Kabushiki Kaisha Toshiba
- Masahiko Yamakawa
- F21 - LIGHTING
Information Patent Grant
White light source and white light source system including the same
- Patent number 9,082,939
- Issue date Jul 14, 2015
- Kabushiki Kaisha Toshiba
- Masahiko Yamakawa
- F21 - LIGHTING
Information Patent Grant
LED light bulb
- Patent number 8,955,996
- Issue date Feb 17, 2015
- Kabushiki Kaisha Toshiba
- Yasumasa Ooya
- F21 - LIGHTING
Information Patent Grant
White light emitting lamp and white LED lighting apparatus includin...
- Patent number 8,884,512
- Issue date Nov 11, 2014
- Kabushiki Kaisha Toshiba
- Masahiko Yamakawa
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
LED light bulb
- Patent number 8,796,915
- Issue date Aug 5, 2014
- Kabushiki Kaisha Toshiba
- Yasumasa Ooya
- F21 - LIGHTING
Information Patent Grant
White lighting device
- Patent number 8,723,412
- Issue date May 13, 2014
- Kabushiki Kaisha Toshiba
- Katsutoshi Nakagawa
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
White light emitting lamp and white LED lighting apparatus includin...
- Patent number 8,710,532
- Issue date Apr 29, 2014
- Kabushiki Kaisha Toshiba
- Masahiko Yamakawa
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
White light-emitting lamp for illumination and illuminating device...
- Patent number 8,426,882
- Issue date Apr 23, 2013
- Kabushiki Kaisha Toshiba
- Ryo Sakai
- F21 - LIGHTING
Information Patent Grant
Phosphor and method for producing same, and light-emitting device u...
- Patent number 7,696,685
- Issue date Apr 13, 2010
- Kabushiki Kaisha Toshiba
- Masahiko Yamakawa
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
METHOD FOR USING WHITE LIGHT SOURCE, AND WHITE LIGHT SOURCE
- Publication number 20240426439
- Publication date Dec 26, 2024
- Seoul Semiconductor Co., Ltd.
- Masahiko YAMAKAWA
- F21 - LIGHTING
Information Patent Application
WHITE LIGHT SOURCE SYSTEM
- Publication number 20240297160
- Publication date Sep 5, 2024
- SEOUL SEMICONDUCTOR CO., LTD.
- Masahiko YAMAKAWA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
METHOD FOR USING WHITE LIGHT SOURCE, AND WHITE LIGHT SOURCE
- Publication number 20240044459
- Publication date Feb 8, 2024
- Seoul Semiconductor Co., Ltd.
- Masahiko YAMAKAWA
- F21 - LIGHTING
Information Patent Application
WHITE LIGHT SOURCE SYSTEM
- Publication number 20230343758
- Publication date Oct 26, 2023
- SEOUL SEMICONDUCTOR CO., LTD.
- Masahiko YAMAKAWA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
WHITE LIGHT SOURCE SYSTEM
- Publication number 20230005889
- Publication date Jan 5, 2023
- SEOUL SEMICONDUCTOR CO., LTD.
- Masahiko YAMAKAWA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
WHITE LIGHT SOURCE SYSTEM
- Publication number 20210242182
- Publication date Aug 5, 2021
- Kabushiki Kaisha Toshiba
- Masahiko YAMAKAWA
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Application
LIGHT SOURCE FOR MYOPIA PREVENTION ARTICLE AND METHOD OF USING LIGH...
- Publication number 20210228901
- Publication date Jul 29, 2021
- Toshiba Materials Co., Ltd.
- Masahiko YAMAKAWA
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
WHITE LIGHT SOURCE SYSTEM
- Publication number 20200253011
- Publication date Aug 6, 2020
- Kabushiki Kaisha Toshiba
- Masahiko YAMAKAWA
- F21 - LIGHTING
Information Patent Application
WHITE LIGHT SOURCE SYSTEM
- Publication number 20190306946
- Publication date Oct 3, 2019
- Kabushiki Kaisha Toshiba
- Masahiko YAMAKAWA
- F21 - LIGHTING
Information Patent Application
PHOSPHOR AND PRODUCTION METHOD THEREOF, AND LIGHT-EMITTING DEVICE
- Publication number 20190233725
- Publication date Aug 1, 2019
- Kabushiki Kaisha Toshiba
- Naotoshi MATSUDA
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
WHITE LIGHT SOURCE SYSTEM
- Publication number 20190159313
- Publication date May 23, 2019
- Kabushiki Kaisha Toshiba
- Masahiko YAMAKAWA
- F21 - LIGHTING
Information Patent Application
LIGHT SOURCE FOR MYOPIA PREVENTION ARTICLE AND METHOD OF USING LIGH...
- Publication number 20180351050
- Publication date Dec 6, 2018
- Toshiba Materials Co., Ltd.
- Masahiko Yamakawa
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
WHITE LIGHT SOURCE SYSTEM
- Publication number 20180135813
- Publication date May 17, 2018
- Kabushiki Kaisha Toshiba
- Masahiko YAMAKAWA
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
WHITE LIGHT SOURCE SYSTEM
- Publication number 20180139817
- Publication date May 17, 2018
- Kabushiki Kaisha Toshiba
- Masahiko Yamakawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
LIGHT EMITTING DEVICE AND LED LIGHT BULB
- Publication number 20180049285
- Publication date Feb 15, 2018
- Toshiba Materials Co., Ltd.
- Hiroyasu Kondo
- F21 - LIGHTING
Information Patent Application
ILLUMINATION SYSTEM AND ILLUMINATION METHOD
- Publication number 20180010749
- Publication date Jan 11, 2018
- Kabushiki Kaisha Toshiba
- Yasuhiro SHIRAKAWA
- F21 - LIGHTING
Information Patent Application
WHITE LIGHT SOURCE AND WHITE LIGHT SOURCE SYSTEM
- Publication number 20170238390
- Publication date Aug 17, 2017
- Kabushiki Kaisha Toshiba
- Masahiko YAMAKAWA
- F21 - LIGHTING
Information Patent Application
LIGHT EMITTING DEVICE AND LED LIGHT BULB
- Publication number 20170048941
- Publication date Feb 16, 2017
- Toshiba Materials Co., Ltd.
- Hiroyasu KONDO
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
WHITE LIGHT SOURCE AND WHITE LIGHT SOURCE SYSTEM INCLUDING THE SAME
- Publication number 20140307417
- Publication date Oct 16, 2014
- Masahiko Yamakawa
- F21 - LIGHTING
Information Patent Application
WHITE LIGHT SOURCE AND WHITE LIGHT SOURCE SYSTEM INCLUDING THE SAME
- Publication number 20140293577
- Publication date Oct 2, 2014
- Masahiko Yamakawa
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
WHITE LIGHT SOURCE AND WHITE LIGHT SOURCE SYSTEM INCLUDING THE SAME
- Publication number 20140284636
- Publication date Sep 25, 2014
- Masahiko Yamakawa
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
WHITE LIGHT SOURCE AND WHITE LIGHT SOURCE SYSTEM INCLUDING THE SAME
- Publication number 20140036499
- Publication date Feb 6, 2014
- Toshiba Materials Co., Ltd.
- Masahiko Yamakawa
- F21 - LIGHTING
Information Patent Application
WHITE LIGHT SOURCE
- Publication number 20140009061
- Publication date Jan 9, 2014
- Toshiba Materials Co., Ltd.
- Tatsunori ITOGA
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
WHITE LIGHT SOURCE AND WHITE LIGHT SOURCE SYSTEM INCLUDING THE SAME
- Publication number 20130307011
- Publication date Nov 21, 2013
- Toshiba Materials Co., Ltd.
- Masahiko Yamakawa
- F21 - LIGHTING
Information Patent Application
WHITE LIGHTING DEVICE
- Publication number 20130241394
- Publication date Sep 19, 2013
- Toshiba Materials Co., Ltd.
- Katsutoshi Nakagawa
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
LED LIGHT BULB
- Publication number 20130188333
- Publication date Jul 25, 2013
- Toshiba Materials Co., Ltd.
- Yasumasa OOYA
- F21 - LIGHTING
Information Patent Application
LED LIGHT BULB
- Publication number 20130169147
- Publication date Jul 4, 2013
- Kabushiki Kaisha Toshiba
- Yasumasa OOYA
- F21 - LIGHTING
Information Patent Application
LED LIGHT BULB
- Publication number 20130100645
- Publication date Apr 25, 2013
- Yasumasa OOYA
- F21 - LIGHTING
Information Patent Application
WHITE LIGHT EMITTING LAMP AND WHITE LED LIGHTING APPARATUS INCLUDIN...
- Publication number 20130001628
- Publication date Jan 3, 2013
- Toshiba Materials Co., Ltd.
- Masahiko Yamakawa
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
WHITE LIGHT EMITTING LAMP AND WHITE LED LIGHTING APPARATUS INCLUDIN...
- Publication number 20120187824
- Publication date Jul 26, 2012
- Toshiba Materials Co., Ltd.
- Masahiko Yamakawa
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...

Masahiko Yamakawa

Person

Patents Grantslast 30 patents

Method for using white light source, and white light source

Light source for myopia prevention article and method of using ligh...

White light source system

White light source system

White light source system

White light source system

Europium-activated alkaline-earth chloroapatite phosphor and light-...

Light source for myopia prevention article and method of using ligh...

White light source system

White light source system

White light source and white light source system

Illumination system for reproducing the color temperature range of...

White light source system

Light emitting device and LED light bulb

Light emitting device and LED light bulb

White light source system

White light source and white light source system including the same

White light source and white light source system including the same

LED light bulb

White light source

White light source and white light source system including the same

White light source and white light source system including the same

White light source and white light source system including the same

LED light bulb

White light emitting lamp and white LED lighting apparatus includin...

LED light bulb

White lighting device

White light emitting lamp and white LED lighting apparatus includin...

White light-emitting lamp for illumination and illuminating device...

Phosphor and method for producing same, and light-emitting device u...

Patents Applicationslast 30 patents

METHOD FOR USING WHITE LIGHT SOURCE, AND WHITE LIGHT SOURCE

WHITE LIGHT SOURCE SYSTEM

METHOD FOR USING WHITE LIGHT SOURCE, AND WHITE LIGHT SOURCE

WHITE LIGHT SOURCE SYSTEM

WHITE LIGHT SOURCE SYSTEM

WHITE LIGHT SOURCE SYSTEM

LIGHT SOURCE FOR MYOPIA PREVENTION ARTICLE AND METHOD OF USING LIGH...

WHITE LIGHT SOURCE SYSTEM

WHITE LIGHT SOURCE SYSTEM

PHOSPHOR AND PRODUCTION METHOD THEREOF, AND LIGHT-EMITTING DEVICE

WHITE LIGHT SOURCE SYSTEM

LIGHT SOURCE FOR MYOPIA PREVENTION ARTICLE AND METHOD OF USING LIGH...

WHITE LIGHT SOURCE SYSTEM

WHITE LIGHT SOURCE SYSTEM

LIGHT EMITTING DEVICE AND LED LIGHT BULB

ILLUMINATION SYSTEM AND ILLUMINATION METHOD

WHITE LIGHT SOURCE AND WHITE LIGHT SOURCE SYSTEM

LIGHT EMITTING DEVICE AND LED LIGHT BULB

WHITE LIGHT SOURCE AND WHITE LIGHT SOURCE SYSTEM INCLUDING THE SAME

WHITE LIGHT SOURCE AND WHITE LIGHT SOURCE SYSTEM INCLUDING THE SAME

WHITE LIGHT SOURCE AND WHITE LIGHT SOURCE SYSTEM INCLUDING THE SAME

WHITE LIGHT SOURCE AND WHITE LIGHT SOURCE SYSTEM INCLUDING THE SAME

WHITE LIGHT SOURCE

WHITE LIGHT SOURCE AND WHITE LIGHT SOURCE SYSTEM INCLUDING THE SAME

WHITE LIGHTING DEVICE

LED LIGHT BULB

LED LIGHT BULB

LED LIGHT BULB

WHITE LIGHT EMITTING LAMP AND WHITE LED LIGHTING APPARATUS INCLUDIN...

WHITE LIGHT EMITTING LAMP AND WHITE LED LIGHTING APPARATUS INCLUDIN...