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 Gaspard ThienpontfiledCriticalGaspard Thienpont
Priority to BE593612ApriorityCriticalpatent/BE593612A/nl
Publication of BE593612ApublicationCriticalpatent/BE593612A/nl
Priority to FR41398Aprioritypatent/FR1285064A/fr
Priority to DE1961T0013605prioritypatent/DE1839573U/de