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 Kohlenscheidungsgesellschaft MfiledCriticalKohlenscheidungsgesellschaft M
Priority to BE521250ApriorityCriticalpatent/BE521250A/fr
Publication of BE521250ApublicationCriticalpatent/BE521250A/fr