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 BE637159DpriorityCriticalpatent/BE637159A/xx
Application filed by Siemens AgfiledCriticalSiemens Ag
Priority to AT822562Aprioritypatent/AT233190B/de
Priority to FR948530Aprioritypatent/FR1378946A/fr
Priority to CH1254763Aprioritypatent/CH416956A/de
Application grantedgrantedCritical
Publication of AT233190BpublicationCriticalpatent/AT233190B/de