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3863783
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Patent number 3,863,783
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Issue date Feb 4, 1975
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B28 - WORKING CEMENT, CLAY, OR STONE
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3768784
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Patent number 3,768,784
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Issue date Oct 30, 1973
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B60 - VEHICLES IN GENERAL
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3684255
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Patent number 3,684,255
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Issue date Aug 15, 1972
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B28 - WORKING CEMENT, CLAY, OR STONE
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3633879
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Patent number 3,633,879
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Issue date Jan 11, 1972
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B28 - WORKING CEMENT, CLAY, OR STONE
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3610405
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Patent number 3,610,405
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Issue date Oct 5, 1971
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B28 - WORKING CEMENT, CLAY, OR STONE
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3521767
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Patent number 3,521,767
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Issue date Jul 28, 1970
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B60 - VEHICLES IN GENERAL
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3402805
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Patent number 3,402,805
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Issue date Sep 24, 1968
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B28 - WORKING CEMENT, CLAY, OR STONE
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3367636
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Patent number 3,367,636
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Issue date Feb 6, 1968
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B28 - WORKING CEMENT, CLAY, OR STONE
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1935922
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Patent number 1,935,922
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Issue date Nov 21, 1933
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B28 - WORKING CEMENT, CLAY, OR STONE
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1255750
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Patent number 1,255,750
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Issue date Feb 5, 1918
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B28 - WORKING CEMENT, CLAY, OR STONE
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1222605
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Patent number 1,222,605
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Issue date Apr 17, 1917
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B28 - WORKING CEMENT, CLAY, OR STONE
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Patent number 952,897
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Issue date Mar 22, 1910
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B28 - WORKING CEMENT, CLAY, OR STONE
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889606
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Patent number 889,606
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Issue date Jun 2, 1908
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B28 - WORKING CEMENT, CLAY, OR STONE
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821267
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Patent number 821,267
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Issue date May 22, 1906
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B28 - WORKING CEMENT, CLAY, OR STONE