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3908501
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Patent number 3,908,501
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Issue date Sep 30, 1975
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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3801089
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Patent number 3,801,089
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Issue date Apr 2, 1974
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B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
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3483783
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Patent number 3,483,783
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Issue date Dec 16, 1969
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2928439
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Patent number 2,928,439
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Issue date Mar 15, 1960
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR