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Fully enclosed die forging apparatus
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Patent number 4,918,970
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Issue date Apr 24, 1990
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Aida Engineering, Ltd.
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Nobuyuki Ishinaga
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Fully enclosed die forging apparatus
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Patent number 4,918,967
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Issue date Apr 24, 1990
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Aida Engineering, Ltd.
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Nobuyuki Ishinaga
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Fully enclosed die forging apparatus
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Patent number 4,914,938
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Issue date Apr 10, 1990
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Aida Engineering, Ltd.
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Nobuyuki Ishinaga
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...