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Mixer
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Patent number 4,610,545
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Issue date Sep 9, 1986
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Monier Limited
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Robert K. Tomlinson
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B28 - WORKING CEMENT, CLAY, OR STONE
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3917236
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Patent number 3,917,236
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Issue date Nov 4, 1975
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B28 - WORKING CEMENT, CLAY, OR STONE
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2698741
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Patent number 2,698,741
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Issue date Jan 4, 1955
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B28 - WORKING CEMENT, CLAY, OR STONE
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2059139
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Patent number 2,059,139
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Issue date Oct 27, 1936
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B28 - WORKING CEMENT, CLAY, OR STONE
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1732281
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Patent number 1,732,281
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Issue date Oct 22, 1929
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B28 - WORKING CEMENT, CLAY, OR STONE
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1456858
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Patent number 1,456,858
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Issue date May 29, 1923
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B28 - WORKING CEMENT, CLAY, OR STONE