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3147535
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Patent number 3,147,535
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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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2280045
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Patent number 2,280,045
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Issue date Apr 14, 1942
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2228965
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Patent number 2,228,965
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Issue date Jan 14, 1941
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2228968
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Patent number 2,228,968
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Issue date Jan 14, 1941
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR