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Hideo Nakamura
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Tokai, JP
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last 30 patents
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Patent Grant
Roller-dies-processing method and apparatus
Patent number
4,343,167
Issue date
Aug 10, 1982
Aichi Steel Works Ltd.
Yoshimichi Hasegawa
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Patent Grant
Roller-dies-processing method and apparatus
Patent number
4,283,930
Issue date
Aug 18, 1981
Aichi Steel Works Limited
Yoshimichi Hasegawa
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...