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Process for producing improved rail
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Patent number 6,446,480
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Issue date Sep 10, 2002
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VGK, Inc.
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Verlan Van Dyke
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Method of making CG iron
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Patent number 4,596,606
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Issue date Jun 24, 1986
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Ford Motor Company
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Bela V. Kovacs
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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2330469
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Patent number 2,330,469
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Issue date Sep 28, 1943
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1877645
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Patent number 1,877,645
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Issue date Sep 13, 1932
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...