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Ceramic heater and mold
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Patent number 8,530,802
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Issue date Sep 10, 2013
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Kyocera Corporation
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Ken Yamamoto
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Contouring gypsum articles
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Patent number 4,150,083
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Issue date Apr 17, 1979
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United States Gypsum Company
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Donald O. Baehr
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B28 - WORKING CEMENT, CLAY, OR STONE
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3066376
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Patent number 3,066,376
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Issue date Dec 4, 1962
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B28 - WORKING CEMENT, CLAY, OR STONE
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2819495
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Patent number 2,819,495
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Issue date Jan 14, 1958
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B28 - WORKING CEMENT, CLAY, OR STONE
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2586413
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Patent number 2,586,413
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Issue date Feb 19, 1952
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B28 - WORKING CEMENT, CLAY, OR STONE
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2245666
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Patent number 2,245,666
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Issue date Jun 17, 1941
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B28 - WORKING CEMENT, CLAY, OR STONE
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1695119
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Patent number 1,695,119
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Issue date Dec 11, 1928
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B28 - WORKING CEMENT, CLAY, OR STONE
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1564810
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Patent number 1,564,810
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Issue date Dec 8, 1925
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B28 - WORKING CEMENT, CLAY, OR STONE