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Method of installing pipes
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Patent number 6,171,435
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Issue date Jan 9, 2001
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BG plc
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Derek Stoves
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Pipe repair clamp
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Patent number 5,797,432
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Issue date Aug 25, 1998
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British Gas PLC
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Peter George Bennett
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Apparatus for bending plastic pipe
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Patent number 5,580,589
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Issue date Dec 3, 1996
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British Gas PLC
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Derek Stoves
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL