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 Hans MichelfiledCriticalHans Michel
Priority to BE595691ApriorityCriticalpatent/BE595691A/fr
Publication of BE595691ApublicationCriticalpatent/BE595691A/fr