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Priority claimed from GB898907807Aexternal-prioritypatent/GB8907807D0/en
Priority claimed from GB898928338Aexternal-prioritypatent/GB8928338D0/en
Priority claimed from PCT/GB1990/000512external-prioritypatent/WO1990012241A1/en
Application filed by Insituform Group LtdfiledCriticalInsituform Group Ltd
Publication of NO913819D0publicationCriticalpatent/NO913819D0/no
Publication of NO913819LpublicationCriticalpatent/NO913819L/no