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3640256
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Patent number 3,640,256
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Issue date Feb 8, 1972
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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3498280
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Patent number 3,498,280
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Issue date Mar 3, 1970
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B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
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3459162
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Patent number 3,459,162
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Issue date Aug 5, 1969
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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2179235
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Patent number 2,179,235
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Issue date Nov 7, 1939
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS