Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CH1614866Aexternal-prioritypatent/CH465468A/fr
Application filed by Henri ReyfiledCriticalHenri Rey
Priority to AT994267ApriorityCriticalpatent/AT309745B/de
Application grantedgrantedCritical
Publication of AT279447BpublicationCriticalpatent/AT279447B/de