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3279763
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Patent number 3,279,763
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Issue date Oct 18, 1966
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B28 - WORKING CEMENT, CLAY, OR STONE
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2756881
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Patent number 2,756,881
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Issue date Jul 31, 1956
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B28 - WORKING CEMENT, CLAY, OR STONE
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2624480
-
Patent number 2,624,480
-
Issue date Jan 6, 1953
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B28 - WORKING CEMENT, CLAY, OR STONE
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2267270
-
Patent number 2,267,270
-
Issue date Dec 23, 1941
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B28 - WORKING CEMENT, CLAY, OR STONE
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979778
-
Patent number 979,778
-
Issue date Dec 27, 1910
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B28 - WORKING CEMENT, CLAY, OR STONE