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Concrete flooring
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Patent number 9,359,760
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Issue date Jun 7, 2016
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COR ENGINEERING LIMITED
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Fergus Ronald Miller
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B28 - WORKING CEMENT, CLAY, OR STONE
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Apparatus for making lined pipe
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Patent number 5,139,404
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Issue date Aug 18, 1992
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International Pipe Machinery Corporation
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Thomas D. Grau
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B28 - WORKING CEMENT, CLAY, OR STONE
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Method of forming lined pipe
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Patent number 5,028,368
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Issue date Jul 2, 1991
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International Pipe Machinery Corporation
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Thomas D. Grau
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B28 - WORKING CEMENT, CLAY, OR STONE
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3899153
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Patent number 3,899,153
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Issue date Aug 12, 1975
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B28 - WORKING CEMENT, CLAY, OR STONE
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3877673
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Patent number 3,877,673
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Issue date Apr 15, 1975
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B28 - WORKING CEMENT, CLAY, OR STONE
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3758068
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Patent number 3,758,068
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Issue date Sep 11, 1973
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B28 - WORKING CEMENT, CLAY, OR STONE
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3734450
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Patent number 3,734,450
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Issue date May 22, 1973
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B28 - WORKING CEMENT, CLAY, OR STONE
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3656732
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Patent number 3,656,732
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Issue date Apr 18, 1972
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B28 - WORKING CEMENT, CLAY, OR STONE
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3570802
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Patent number 3,570,802
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Issue date Mar 16, 1971
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B28 - WORKING CEMENT, CLAY, OR STONE
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3467740
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Patent number 3,467,740
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Issue date Sep 16, 1969
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B28 - WORKING CEMENT, CLAY, OR STONE
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3164877
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Patent number 3,164,877
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Issue date Jan 12, 1965
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B28 - WORKING CEMENT, CLAY, OR STONE
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3146510
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Patent number 3,146,510
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Issue date Sep 1, 1964
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B28 - WORKING CEMENT, CLAY, OR STONE
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3047928
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Patent number 3,047,928
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Issue date Aug 7, 1962
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B28 - WORKING CEMENT, CLAY, OR STONE
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2932075
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Patent number 2,932,075
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Issue date Apr 12, 1960
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B28 - WORKING CEMENT, CLAY, OR STONE