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Plasterboard manufacture
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Patent number 4,063,976
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Issue date Dec 20, 1977
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BPB Industries Limited
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Alan James Bradley Wain
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B28 - WORKING CEMENT, CLAY, OR STONE
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Granulating method and apparatus
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Patent number 3,950,181
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Issue date Apr 13, 1976
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BPB Industries Limited
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Thomas Albert Pilgrim
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Accelerator
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Patent number 3,947,285
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Issue date Mar 30, 1976
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BPB Industries Limited
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Kenneth Wood Jones
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES