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Die holder
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Patent number 3,970,179
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Issue date Jul 20, 1976
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Jerome Friedman
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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3637058
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Patent number 3,637,058
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Issue date Jan 25, 1972
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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3144887
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Patent number 3,144,887
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Issue date Aug 18, 1964
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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2920729
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Patent number 2,920,729
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Issue date Jan 12, 1960
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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2826099
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Patent number 2,826,099
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Issue date Mar 11, 1958
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR