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Vacuum treatment unit
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Issue date May 12, 1981
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Tremix AB
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Harald S. Wenander
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E04 - BUILDING
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3600771
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Patent number 3,600,771
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Issue date Aug 24, 1971
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B28 - WORKING CEMENT, CLAY, OR STONE
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3506747
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Patent number 3,506,747
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Issue date Apr 14, 1970
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B28 - WORKING CEMENT, CLAY, OR STONE
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2167200
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E04 - BUILDING
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1989409
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Issue date Jan 29, 1935
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E04 - BUILDING
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1362069
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Patent number 1,362,069
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Issue date Dec 14, 1920
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E04 - BUILDING