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 Ludwig Roemer K GfiledCriticalLudwig Roemer K G
Priority to BE584253ApriorityCriticalpatent/BE584253A/fr
Publication of BE584253ApublicationCriticalpatent/BE584253A/fr