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Takeshi Kawashima
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Miyagi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Nitride semiconductor multilayer structure, light emitting element,...
Patent number
11,444,434
Issue date
Sep 13, 2022
Ricoh Company, Ltd.
Takeshi Kawashima
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Reflector, surface emitting laser, method for manufacturing reflect...
Patent number
11,245,249
Issue date
Feb 8, 2022
Ricoh Company, Ltd.
Takeshi Kawashima
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Light emitting device and method of manufacturing light emitting de...
Patent number
10,797,470
Issue date
Oct 6, 2020
Ricoh Company, Ltd.
Takeshi Kawashima
H01 - BASIC ELECTRIC ELEMENTS
Patents Applications
last 30 patents
Information
Patent Application
LIGHT EMITTING ELEMENT, LIGHT SOURCE DEVICE, DISPLAY DEVICE, HEAD-M...
Publication number
20230299561
Publication date
Sep 21, 2023
Takeshi KAWASHIMA
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
REFLECTING MIRROR, VERTICAL CAVITY SURFACE EMITTING LASER, VERTICAL...
Publication number
20230065551
Publication date
Mar 2, 2023
Morimasa KAMINISHI
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
REFLECTOR, SURFACE-EMITTING LASER, LIGHT SOURCE, PROJECTION DEVICE,...
Publication number
20210336421
Publication date
Oct 28, 2021
RICOH COMPANY, LTD.
Takeshi Kawashima
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
NITRIDE SEMICONDUCTOR MULTILAYER STRUCTURE, LIGHT EMITTING ELEMENT,...
Publication number
20200244043
Publication date
Jul 30, 2020
RICOH COMPANY, LTD.
Takeshi KAWASHIMA
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
LIGHT EMITTING DEVICE AND METHOD OF MANUFACTURING LIGHT EMITTING DE...
Publication number
20200044416
Publication date
Feb 6, 2020
RICOH COMPANY, LTD.
TAKESHI KAWASHIMA
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
REFLECTOR, SURFACE EMITTING LASER, METHOD FOR MANUFACTURING REFLECT...
Publication number
20190273360
Publication date
Sep 5, 2019
Takeshi Kawashima
F21 - LIGHTING