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
Priority claimed from NL8002714Aexternal-prioritypatent/NL8002714A/en
Application filed by J C Langen, C P LangenfiledCriticalJ C Langen
Publication of DK582181ApublicationCriticalpatent/DK582181A/en