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3640182
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Patent number 3,640,182
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Issue date Feb 8, 1972
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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3572206
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Patent number 3,572,206
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Issue date Mar 23, 1971
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2926463
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Patent number 2,926,463
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Issue date Mar 1, 1960
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2885832
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Patent number 2,885,832
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Issue date May 12, 1959
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2649033
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Patent number 2,649,033
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Issue date Aug 18, 1953
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR