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NL9100199A
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Stackable building brick arrangement - has air cavities, chamfered raised top ridges and corresponding bottom recesses
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NL8600741A
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Fire resistant reinforced concrete - has a layer of heat insulating concrete between the reinforcement and the external side
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DK9386D0
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Procedure for the manufacture of road elements and other building parts insulating, poroest material
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ZA8503443B
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A method for the manufacture of insulating,porous,shaped articles
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WO8503503A1
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A method for the manufacture of insulating porous shaped building articles
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