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Application filed by Ludwig CanalfiledCriticalLudwig Canal
Priority to AT566967ApriorityCriticalpatent/AT276664B/de
Priority to CH834768Aprioritypatent/CH494193A/de
Priority to FR1574214Dprioritypatent/FR1574214A/fr
Application grantedgrantedCritical
Publication of AT276664BpublicationCriticalpatent/AT276664B/de