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3929048
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Patent number 3,929,048
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Issue date Dec 30, 1975
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B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
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1947397
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Patent number 1,947,397
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Issue date Feb 13, 1934
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B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
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1725495
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Patent number 1,725,495
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Issue date Aug 20, 1929
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B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
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1617584
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Patent number 1,617,584
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Issue date Feb 15, 1927
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B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...