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 F Drecq EtsfiledCriticalF Drecq Ets
Priority to BE578315ApriorityCriticalpatent/BE578315A/en
Publication of BE578315ApublicationCriticalpatent/BE578315A/en