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Shinya Oooka
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Fukuroi-shi, JP
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Patents Grants
last 30 patents
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Patent Grant
Needle roller bearing and its manufacturing method
Patent number
7,571,706
Issue date
Aug 11, 2009
NTN Corporation
Kenichi Ichikawa
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Patents Applications
last 30 patents
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Patent Application
Needle roller bearing and its manufacturing method
Publication number
20070068338
Publication date
Mar 29, 2007
Kenichi Ichikawa
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...