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3864443
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Patent number 3,864,443
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Issue date Feb 4, 1975
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B28 - WORKING CEMENT, CLAY, OR STONE
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3789102
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Patent number 3,789,102
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Issue date Jan 29, 1974
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B28 - WORKING CEMENT, CLAY, OR STONE
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3687800
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Patent number 3,687,800
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Issue date Aug 29, 1972
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B28 - WORKING CEMENT, CLAY, OR STONE
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3184324
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Patent number 3,184,324
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Issue date May 18, 1965
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B28 - WORKING CEMENT, CLAY, OR STONE
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3104184
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Patent number 3,104,184
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Issue date Sep 17, 1963
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B28 - WORKING CEMENT, CLAY, OR STONE
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2934808
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Patent number 2,934,808
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Issue date May 3, 1960
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B28 - WORKING CEMENT, CLAY, OR STONE
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2843081
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Patent number 2,843,081
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Issue date Jul 15, 1958
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B28 - WORKING CEMENT, CLAY, OR STONE
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2705358
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Patent number 2,705,358
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Issue date Apr 5, 1955
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B28 - WORKING CEMENT, CLAY, OR STONE
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2679386
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Patent number 2,679,386
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Issue date May 25, 1954
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B28 - WORKING CEMENT, CLAY, OR STONE
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2623382
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Patent number 2,623,382
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Issue date Dec 30, 1952
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B44 - DECORATIVE ARTS
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2611589
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Patent number 2,611,589
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Issue date Sep 23, 1952
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B28 - WORKING CEMENT, CLAY, OR STONE
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2595880
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Patent number 2,595,880
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Issue date May 6, 1952
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B28 - WORKING CEMENT, CLAY, OR STONE
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2559543
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Patent number 2,559,543
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Issue date Jul 3, 1951
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B28 - WORKING CEMENT, CLAY, OR STONE
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2469229
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Patent number 2,469,229
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Issue date May 3, 1949
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B28 - WORKING CEMENT, CLAY, OR STONE
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2411269
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Patent number 2,411,269
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Issue date Nov 19, 1946
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B28 - WORKING CEMENT, CLAY, OR STONE
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2375191
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Patent number 2,375,191
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Issue date May 8, 1945
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B28 - WORKING CEMENT, CLAY, OR STONE
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2359879
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Patent number 2,359,879
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Issue date Oct 10, 1944
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B28 - WORKING CEMENT, CLAY, OR STONE
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2347940
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Patent number 2,347,940
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Issue date May 2, 1944
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B28 - WORKING CEMENT, CLAY, OR STONE
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2276486
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Patent number 2,276,486
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Issue date Mar 17, 1942
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B28 - WORKING CEMENT, CLAY, OR STONE
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2276487
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Patent number 2,276,487
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Issue date Mar 17, 1942
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B28 - WORKING CEMENT, CLAY, OR STONE
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2276484
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Patent number 2,276,484
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Issue date Mar 17, 1942
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B28 - WORKING CEMENT, CLAY, OR STONE
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2276485
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Patent number 2,276,485
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Issue date Mar 17, 1942
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B28 - WORKING CEMENT, CLAY, OR STONE