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Plate rolling mill
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Patent number 6,446,477
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Issue date Sep 10, 2002
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Hitachi, Ltd.
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Kenichi Yasuda
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Plate rolling mill
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Patent number 6,250,126
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Issue date Jun 26, 2001
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Hitachi, Ltd.
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Kenichi Yasuda
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Rolling mill and rolling method
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Patent number 6,003,355
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Issue date Dec 21, 1999
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Hitachi, Ltd.
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Kenichi Yasuda
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3868839
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Patent number 3,868,839
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Issue date Mar 4, 1975
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3847062
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Patent number 3,847,062
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Issue date Nov 12, 1974
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3355228
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Patent number 3,355,228
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Issue date Nov 28, 1967
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3064509
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Patent number 3,064,509
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1519657
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Patent number 1,519,657
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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977725
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Issue date Dec 6, 1910
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...