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2947287
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Patent number 2,947,287
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Issue date Aug 2, 1960
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2849986
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Patent number 2,849,986
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Issue date Sep 2, 1958
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2699651
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Patent number 2,699,651
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Issue date Jan 18, 1955
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2499633
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Patent number 2,499,633
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Issue date Mar 7, 1950
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2049901
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Patent number 2,049,901
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Issue date Aug 4, 1936
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR