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 Leutgeb HansfiledCriticalLeutgeb Hans
Priority to NL1921ApriorityCriticalpatent/NL724C/nl
Application grantedgrantedCritical
Publication of NL724CpublicationCriticalpatent/NL724C/nl