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
Application filed by Willy EckertfiledCriticalWilly Eckert
Priority to BE579652ApriorityCriticalpatent/BE579652A/en
Publication of BE579652ApublicationCriticalpatent/BE579652A/en