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 Heinrich Friedrich And LohmannfiledCriticalHeinrich Friedrich And Lohmann
Application grantedgrantedCritical
Publication of AT2148BpublicationCriticalpatent/AT2148B/de