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2688306
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Patent number 2,688,306
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Issue date Sep 7, 1954
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B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
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2542804
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Patent number 2,542,804
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Issue date Feb 20, 1951
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B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...