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Takayoshi Maeda
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Takatsuki, JP
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Patents Grants
last 30 patents
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Patent Grant
Substrate of gallium nitride single crystal and process for produci...
Patent number
7,399,687
Issue date
Jul 15, 2008
Sumitomo Chemical Company, Limited
Kazumasa Hiramatsu
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Method of manufacturing III-V group compound semiconductor
Patent number
6,946,308
Issue date
Sep 20, 2005
Sumitomo Chemical Company, Limited
Kazumasa Hiramatsu
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
III-V compound semiconductor
Patent number
6,844,574
Issue date
Jan 18, 2005
Sumitomo Chemical Company, Limited
Kazumasa Hiramatsu
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Method for fabricating III-V group compound semiconductor
Patent number
6,756,246
Issue date
Jun 29, 2004
Sumitomo Chemical Company, Limited
Kazumasa Hiramatsu
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Group III-V compound semiconductor and method of producing the same
Patent number
6,503,610
Issue date
Jan 7, 2003
Sumitomo Chemical Company, Limited
Kazumasa Hiramatsu
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Epitaxially grown compound-semiconductor crystal
Patent number
5,332,451
Issue date
Jul 26, 1994
Sumitomo Chemical Company, Limited
Masahiko Hata
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Vapor-phase epitaxial growth method
Patent number
5,064,778
Issue date
Nov 12, 1991
Sumitomo Chemical Co., Ltd.
Takayoshi Maeda
C30 - CRYSTAL GROWTH
Information
Patent Grant
Apparatus for vapor-phase growth
Patent number
4,976,216
Issue date
Dec 11, 1990
Sumitomo Chemical Co., Ltd.
Takayoshi Maeda
C30 - CRYSTAL GROWTH
Information
Patent Grant
Process for production of sialons
Patent number
4,172,108
Issue date
Oct 23, 1979
Sumitomo Chemical Co., Ltd.
Takayoshi Maeda
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Patents Applications
last 30 patents
Information
Patent Application
Substrate of gallium nitride single crystal and process for produci...
Publication number
20060172512
Publication date
Aug 3, 2006
Kazumasa Hiramatsu
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Method of manufacturing III-V group compound semiconductor
Publication number
20030211710
Publication date
Nov 13, 2003
Kazumasa Hiramatsu
C30 - CRYSTAL GROWTH
Information
Patent Application
Method for fabricating III-V Group compound semiconductor
Publication number
20030045017
Publication date
Mar 6, 2003
Kazumasa Hiramatsu
C30 - CRYSTAL GROWTH
Information
Patent Application
Group III-V compound semiconductor and method of producing the same
Publication number
20010031385
Publication date
Oct 18, 2001
Kazumasa Hiramatsu
C30 - CRYSTAL GROWTH