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Batching system
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Patent number 4,810,159
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Issue date Mar 7, 1989
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Rudi Stegmuller
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B28 - WORKING CEMENT, CLAY, OR STONE
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Mobile batch plants
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Patent number 4,775,275
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Issue date Oct 4, 1988
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L. F. Perry
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B28 - WORKING CEMENT, CLAY, OR STONE
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Mixing plant
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Patent number 4,580,902
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Issue date Apr 8, 1986
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Dunstan & Partners Pty. Ltd
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Trevor G. Dunstan
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B28 - WORKING CEMENT, CLAY, OR STONE
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3891193
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Patent number 3,891,193
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Issue date Jun 24, 1975
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B28 - WORKING CEMENT, CLAY, OR STONE
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3595535
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Patent number 3,595,535
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Issue date Jul 27, 1971
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B28 - WORKING CEMENT, CLAY, OR STONE
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3151849
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Patent number 3,151,849
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Issue date Oct 6, 1964
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B28 - WORKING CEMENT, CLAY, OR STONE