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 Georges De SchrijverfiledCriticalGeorges De Schrijver
Priority to BE615502ApriorityCriticalpatent/BE615502A/en
Publication of BE615502ApublicationCriticalpatent/BE615502A/en