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Atsutoshi Sugiyama
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Gifu, JP
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Patents Grants
last 30 patents
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Patent Grant
Ceramic dynamic-pressure bearing and hard disk drive using the same
Patent number
7,215,508
Issue date
May 8, 2007
NGK Spark Plug Co., Ltd.
Hironobu Ishikawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Ceramic dynamic pressure bearing, motor with bearing, hard disk dev...
Patent number
6,659,647
Issue date
Dec 9, 2003
NGK Spark Plug Co., Ltd.
Atsutoshi Sugiyama
G11 - INFORMATION STORAGE
Patents Applications
last 30 patents
Information
Patent Application
Ceramic dynamic-pressure bearing and hard disk drive using the same
Publication number
20030053250
Publication date
Mar 20, 2003
NGK SPARK PLUG CO., LTD.
Hironobu Ishikawa
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Application
Ceramic dynamic pressure bearing, motor with bearing, hard disk dev...
Publication number
20020154840
Publication date
Oct 24, 2002
NGK SPARK PLUG CO., LTD.
Atsutoshi Sugiyama
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES