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Composite board
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Patent number 5,549,863
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Issue date Aug 27, 1996
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Plascon Technologies (Proprietary) Limited
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Michael W. Symons
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B32 - LAYERED PRODUCTS
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Method of making a building board
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Patent number 5,395,571
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Issue date Mar 7, 1995
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Plascon Technologies (Proprietary) Limited
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Michael W. Symons
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Composite panel
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Patent number 5,309,690
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Issue date May 10, 1994
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Plascon Technologies (Proprietary) Limited
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Michael W. Symons
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B32 - LAYERED PRODUCTS
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Method of making a composite structure
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Patent number 5,258,087
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Issue date Nov 2, 1993
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Plascon Technologies (Proprietary) Limited
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Michael W. Symons
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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