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Pipeline pigging
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Patent number 6,109,829
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Issue date Aug 29, 2000
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Coflexip Stena Offshore Ltd.
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John Duncan Cruickshank
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Pipeline storage
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Patent number 6,089,489
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Issue date Jul 18, 2000
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Coflexip Stena Offshore Limited
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John Duncan Cruickshank
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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Fluid pipelines
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Patent number 5,988,691
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Issue date Nov 23, 1999
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Coflexip Stena Offshore Limited
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John Duncan Cruickshank
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...