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 Cornelis VisfiledCriticalCornelis Vis
Priority to BE594970ApriorityCriticalpatent/BE594970A/en
Publication of BE594970ApublicationCriticalpatent/BE594970A/en