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Kenji Yamamotoya
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Yokohama-shi, JP
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Patents Grants
last 30 patents
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Patent Grant
Compression coil spring and manufacturing device and manufacturing...
Patent number
8,695,956
Issue date
Apr 15, 2014
NHK Spring Co., Ltd.
Toshio Hamano
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Patents Applications
last 30 patents
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Patent Application
COMPRESSION COIL SPRING AND MANUFACTURING DEVICE AND MANUFACTURING...
Publication number
20120013059
Publication date
Jan 19, 2012
NHK Spring Co., Ltd.
Toshio Hamano
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...