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 Valdemar BirnfiledCriticalValdemar Birn
Application grantedgrantedCritical
Publication of DK60019CpublicationCriticalpatent/DK60019C/da