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Ceramic log moulding process
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Patent number 5,271,888
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Issue date Dec 21, 1993
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Specialty Management Group, Inc.
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Wayne A. Sinsley
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B28 - WORKING CEMENT, CLAY, OR STONE
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Constant level slurry tank
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Patent number 4,487,160
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Issue date Dec 11, 1984
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AEPLC
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Norman W. Frankish
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B28 - WORKING CEMENT, CLAY, OR STONE
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3066069
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Patent number 3,066,069
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Issue date Nov 27, 1962
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B28 - WORKING CEMENT, CLAY, OR STONE
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2171006
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Patent number 2,171,006
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Issue date Aug 29, 1939
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B28 - WORKING CEMENT, CLAY, OR STONE
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1752307
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Patent number 1,752,307
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Issue date Apr 1, 1930
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B28 - WORKING CEMENT, CLAY, OR STONE
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1623631
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Patent number 1,623,631
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Issue date Apr 5, 1927
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B28 - WORKING CEMENT, CLAY, OR STONE