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 Carl Henrik HelmfiledCriticalCarl Henrik Helm
Priority to DK83645ApriorityCriticalpatent/DK66880C/da
Application grantedgrantedCritical
Publication of DK66880CpublicationCriticalpatent/DK66880C/da