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Ventilation system
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Patent number 6,666,762
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Issue date Dec 23, 2003
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Ultraframe (UK) Limited, Enterprise Works
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Christopher Richardson
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F24 - HEATING RANGES VENTILATING
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Structural members
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Patent number 6,000,190
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Issue date Dec 14, 1999
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Ultraframe (U.K.) Limited of Enterprise Works
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Christopher Richardson
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E04 - BUILDING
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Building elements
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Patent number 5,966,888
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Issue date Oct 19, 1999
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Ultraframe (U.K.) Limited of Enterprise Works
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Christopher Richardson
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E04 - BUILDING