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Priority to NL6513872ApriorityCriticalpatent/NL6513872A/xx
Priority to CH1412166Aprioritypatent/CH441851A/de
Priority to DE19661507300prioritypatent/DE1507300A1/de
Priority to AT942466Aprioritypatent/AT274668B/de
Publication of NL6513872ApublicationCriticalpatent/NL6513872A/xx