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2178280
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Patent number 2,178,280
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Issue date Oct 31, 1939
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B66 - HOISTING LIFTING HAULING
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1908556
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Patent number 1,908,556
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Issue date May 9, 1933
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A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
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1644765
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Patent number 1,644,765
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Issue date Oct 11, 1927
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A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
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1557470
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Patent number 1,557,470
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Issue date Oct 13, 1925
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A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING