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Sadahiko Mitsugi
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Hitachi, JP
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last 30 patents
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Patent Grant
Liquid pressure extrusion method and device for tube or tubular member
Patent number
4,138,871
Issue date
Feb 13, 1979
Hitachi Cable, Ltd.
Hideo Kawano
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...