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 O H ButtenschoenfiledCriticalO H Buttenschoen
Priority to DK513978ApriorityCriticalpatent/DK513978A/en
Publication of DK513978ApublicationCriticalpatent/DK513978A/en