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3373640
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Patent number 3,373,640
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Issue date Mar 19, 1968
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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3147655
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Patent number 3,147,655
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Issue date Sep 8, 1964
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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3145599
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Patent number 3,145,599
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Issue date Aug 25, 1964
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2669908
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Patent number 2,669,908
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Issue date Feb 23, 1954
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR