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Mobile straw beam fabricator
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Patent number 7,481,960
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Issue date Jan 27, 2009
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Ashland School of Environmental Technology
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David Ward
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B28 - WORKING CEMENT, CLAY, OR STONE
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Block-ramming machine
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Patent number 7,311,865
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Issue date Dec 25, 2007
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Larry Don Williamson
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B28 - WORKING CEMENT, CLAY, OR STONE
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Manufacturing platform
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Patent number 6,767,000
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Issue date Jul 27, 2004
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Poul Heide
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B28 - WORKING CEMENT, CLAY, OR STONE
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Block making machine
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Patent number 4,579,706
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Issue date Apr 1, 1986
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Adobe International, Inc.
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Henry Elkins
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B28 - WORKING CEMENT, CLAY, OR STONE
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3659979
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Patent number 3,659,979
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Issue date May 2, 1972
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B28 - WORKING CEMENT, CLAY, OR STONE
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3525131
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Patent number 3,525,131
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Issue date Aug 25, 1970
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B28 - WORKING CEMENT, CLAY, OR STONE