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 Frans Louis LauwersfiledCriticalFrans Louis Lauwers
Priority to BE582752ApriorityCriticalpatent/BE582752A/nl
Publication of BE582752ApublicationCriticalpatent/BE582752A/nl