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3832108
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Patent number 3,832,108
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Issue date Aug 27, 1974
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B28 - WORKING CEMENT, CLAY, OR STONE
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3785914
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Patent number 3,785,914
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Issue date Jan 15, 1974
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B28 - WORKING CEMENT, CLAY, OR STONE
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3622148
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Patent number 3,622,148
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Issue date Nov 23, 1971
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B28 - WORKING CEMENT, CLAY, OR STONE
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3616097
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Patent number 3,616,097
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Issue date Oct 26, 1971
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B28 - WORKING CEMENT, CLAY, OR STONE
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3570066
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Patent number 3,570,066
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Issue date Mar 16, 1971
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B28 - WORKING CEMENT, CLAY, OR STONE
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3506537
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Patent number 3,506,537
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Issue date Apr 14, 1970
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B28 - WORKING CEMENT, CLAY, OR STONE
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3489387
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Patent number 3,489,387
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Issue date Jan 13, 1970
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B28 - WORKING CEMENT, CLAY, OR STONE
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3333296
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Patent number 3,333,296
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Issue date Aug 1, 1967
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B28 - WORKING CEMENT, CLAY, OR STONE
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3307236
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Patent number 3,307,236
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Issue date Mar 7, 1967
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B28 - WORKING CEMENT, CLAY, OR STONE
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3231647
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Patent number 3,231,647
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Issue date Jan 25, 1966
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B28 - WORKING CEMENT, CLAY, OR STONE
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3224205
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Patent number 3,224,205
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Issue date Dec 21, 1965
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B28 - WORKING CEMENT, CLAY, OR STONE
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3179726
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Patent number 3,179,726
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Issue date Apr 20, 1965
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B28 - WORKING CEMENT, CLAY, OR STONE
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3173828
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Patent number 3,173,828
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Issue date Mar 16, 1965
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B28 - WORKING CEMENT, CLAY, OR STONE
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3169274
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Patent number 3,169,274
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Issue date Feb 16, 1965
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B28 - WORKING CEMENT, CLAY, OR STONE
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3118808
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Patent number 3,118,808
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Issue date Jan 21, 1964
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B28 - WORKING CEMENT, CLAY, OR STONE
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3099061
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Patent number 3,099,061
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Issue date Jul 30, 1963
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B28 - WORKING CEMENT, CLAY, OR STONE
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3010511
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Patent number 3,010,511
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Issue date Nov 28, 1961
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B28 - WORKING CEMENT, CLAY, OR STONE
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2779252
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Patent number 2,779,252
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Issue date Jan 29, 1957
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B28 - WORKING CEMENT, CLAY, OR STONE
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2741955
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Patent number 2,741,955
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Issue date Apr 17, 1956
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B28 - WORKING CEMENT, CLAY, OR STONE
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2739483
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Patent number 2,739,483
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Issue date Mar 27, 1956
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B28 - WORKING CEMENT, CLAY, OR STONE
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2718822
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Patent number 2,718,822
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Issue date Sep 27, 1955
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B28 - WORKING CEMENT, CLAY, OR STONE
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2698097
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Patent number 2,698,097
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Issue date Dec 28, 1954
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B28 - WORKING CEMENT, CLAY, OR STONE
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2672076
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Patent number 2,672,076
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Issue date Mar 16, 1954
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B28 - WORKING CEMENT, CLAY, OR STONE
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2668574
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Patent number 2,668,574
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Issue date Feb 9, 1954
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B28 - WORKING CEMENT, CLAY, OR STONE
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2655196
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Patent number 2,655,196
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Issue date Oct 13, 1953
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B28 - WORKING CEMENT, CLAY, OR STONE
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2645269
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Patent number 2,645,269
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Issue date Jul 14, 1953
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B28 - WORKING CEMENT, CLAY, OR STONE
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2635508
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Patent number 2,635,508
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Issue date Apr 21, 1953
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B28 - WORKING CEMENT, CLAY, OR STONE