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 Karl August DuppengiesserfiledCriticalKarl August Duppengiesser
Priority to BE577073ApriorityCriticalpatent/BE577073R/en
Application grantedgrantedCritical
Publication of BE577073RpublicationCriticalpatent/BE577073R/en