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 Erich HausdorffiledCriticalErich Hausdorf
Application grantedgrantedCritical
Publication of DK52903CpublicationCriticalpatent/DK52903C/da