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Concrete batch mixer
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Patent number 7,967,496
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Issue date Jun 28, 2011
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Mark E. Wallgren
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B28 - WORKING CEMENT, CLAY, OR STONE
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2523506
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Patent number 2,523,506
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Issue date Sep 26, 1950
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B28 - WORKING CEMENT, CLAY, OR STONE
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2395571
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Patent number 2,395,571
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Issue date Feb 26, 1946
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B28 - WORKING CEMENT, CLAY, OR STONE
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2179104
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Patent number 2,179,104
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Issue date Nov 7, 1939
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B28 - WORKING CEMENT, CLAY, OR STONE
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2135874
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Patent number 2,135,874
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Issue date Nov 8, 1938
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B28 - WORKING CEMENT, CLAY, OR STONE
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1842879
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Patent number 1,842,879
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Issue date Jan 26, 1932
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B28 - WORKING CEMENT, CLAY, OR STONE
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1765450
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Patent number 1,765,450
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Issue date Jun 24, 1930
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B28 - WORKING CEMENT, CLAY, OR STONE
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1628378
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Patent number 1,628,378
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Issue date May 10, 1927
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B28 - WORKING CEMENT, CLAY, OR STONE
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1619626
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Patent number 1,619,626
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Issue date Mar 1, 1927
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B28 - WORKING CEMENT, CLAY, OR STONE
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1581587
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Patent number 1,581,587
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Issue date Apr 20, 1926
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B28 - WORKING CEMENT, CLAY, OR STONE
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1569984
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Patent number 1,569,984
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Issue date Jan 19, 1926
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B28 - WORKING CEMENT, CLAY, OR STONE
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1561144
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Patent number 1,561,144
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Issue date Nov 10, 1925
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B28 - WORKING CEMENT, CLAY, OR STONE
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1545086
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Patent number 1,545,086
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Issue date Jul 7, 1925
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B28 - WORKING CEMENT, CLAY, OR STONE
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1532249
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Patent number 1,532,249
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Issue date Apr 7, 1925
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B28 - WORKING CEMENT, CLAY, OR STONE
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1515605
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Patent number 1,515,605
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Issue date Nov 18, 1924
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B28 - WORKING CEMENT, CLAY, OR STONE
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1512501
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Patent number 1,512,501
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Issue date Oct 21, 1924
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B28 - WORKING CEMENT, CLAY, OR STONE
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1487183
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Patent number 1,487,183
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Issue date Mar 18, 1924
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B28 - WORKING CEMENT, CLAY, OR STONE
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1477543
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Patent number 1,477,543
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Issue date Dec 18, 1923
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B28 - WORKING CEMENT, CLAY, OR STONE
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1415411
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Patent number 1,415,411
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Issue date May 9, 1922
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B28 - WORKING CEMENT, CLAY, OR STONE
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1415410
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Patent number 1,415,410
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Issue date May 9, 1922
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B28 - WORKING CEMENT, CLAY, OR STONE
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1394161
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Patent number 1,394,161
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Issue date Oct 18, 1921
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B28 - WORKING CEMENT, CLAY, OR STONE
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1388696
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Patent number 1,388,696
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Issue date Aug 23, 1921
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B28 - WORKING CEMENT, CLAY, OR STONE
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1354326
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Patent number 1,354,326
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Issue date Sep 28, 1920
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B28 - WORKING CEMENT, CLAY, OR STONE
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1350293
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Patent number 1,350,293
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Issue date Aug 24, 1920
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B28 - WORKING CEMENT, CLAY, OR STONE
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1308148
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Patent number 1,308,148
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Issue date Jul 1, 1919
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B28 - WORKING CEMENT, CLAY, OR STONE
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1292209
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Patent number 1,292,209
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Issue date Jan 21, 1919
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B28 - WORKING CEMENT, CLAY, OR STONE
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1243614
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Patent number 1,243,614
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Issue date Oct 16, 1917
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B28 - WORKING CEMENT, CLAY, OR STONE
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1230731
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Patent number 1,230,731
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Issue date Jun 19, 1917
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B28 - WORKING CEMENT, CLAY, OR STONE
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1211539
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Patent number 1,211,539
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Issue date Jan 9, 1917
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B28 - WORKING CEMENT, CLAY, OR STONE
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1195941
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Patent number 1,195,941
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Issue date Aug 22, 1916
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B28 - WORKING CEMENT, CLAY, OR STONE