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Application filed by Schweizerische IsolawerkefiledCriticalSchweizerische Isolawerke
Priority to IN236/DEL/86ApriorityCriticalpatent/IN170382B/en
Priority to IN529/DEL/88Aprioritypatent/IN170350B/en
Priority to IN528/DEL/88Aprioritypatent/IN170587B/en
Publication of IN170382BpublicationCriticalpatent/IN170382B/en