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Priority claimed from IN1315/CAL/77Aexternal-prioritypatent/IN149958B/en
Priority claimed from NL7709677Aexternal-prioritypatent/NL162000C/xx
Application filed by Nedschroef Octrooi MaatsfiledCriticalNedschroef Octrooi Maats
Priority to IN1581/CAL/77ApriorityCriticalpatent/IN149959B/en
Publication of IN149959BpublicationCriticalpatent/IN149959B/en