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Tsutomu Koike
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Ibaraki, JP
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last 30 patents
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Patent Grant
Method and apparatus for plastically forming helical internal gears...
Patent number
4,924,690
Issue date
May 15, 1990
M.H. Center Limited
Hisanobu Kanamaru
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Patent Grant
Apparatus for forming metallic article by cold extrusion
Patent number
4,653,305
Issue date
Mar 31, 1987
Hitachi, Ltd.
Hisanobu Kanamaru
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...