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Priority claimed from US07/091,142external-prioritypatent/US4773540A/en
Application filed by Manville CorpfiledCriticalManville Corp
Publication of NO891737D0publicationCriticalpatent/NO891737D0/no
Publication of NO891737LpublicationCriticalpatent/NO891737L/no
Publication of NO172884BpublicationCriticalpatent/NO172884B/no
Publication of NO172884CpublicationCriticalpatent/NO172884C/no