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2781280
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Patent number 2,781,280
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Issue date Feb 12, 1957
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B05 - SPRAYING OR ATOMISING IN GENERAL APPLYING LIQUIDS OR OTHER FLUENT MATER...
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2692006
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Patent number 2,692,006
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Issue date Oct 19, 1954
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B28 - WORKING CEMENT, CLAY, OR STONE
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2597021
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Patent number 2,597,021
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Issue date May 20, 1952
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B05 - SPRAYING OR ATOMISING IN GENERAL APPLYING LIQUIDS OR OTHER FLUENT MATER...