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3849214
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Patent number 3,849,214
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Issue date Nov 19, 1974
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C21 - METALLURGY OF IRON
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3421925
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C21 - METALLURGY OF IRON
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3163201
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3161225
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Patent number 3,161,225
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3130088
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Patent number 3,130,088
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3005737
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Patent number 3,005,737
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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2980561
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Patent number 2,980,561
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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C21 - METALLURGY OF IRON
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1980011
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Patent number 1,980,011
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Issue date Nov 6, 1934
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C21 - METALLURGY OF IRON