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 to DEB60421ApriorityCriticalpatent/DE1231406B/en
Application filed by Bautechnik AnstaltfiledCriticalBautechnik Anstalt
Priority to AT552361Aprioritypatent/AT226935B/en
Priority to DEB63739Aprioritypatent/DE1235557B/en
Priority to CH985161Aprioritypatent/CH392021A/en
Priority to FR871573Aprioritypatent/FR1298671A/en
Priority to BE607538Aprioritypatent/BE607538A/en
Priority to GB30877/61Aprioritypatent/GB977877A/en
Application grantedgrantedCritical
Publication of AT226935BpublicationCriticalpatent/AT226935B/en