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 Bartels & Rieger Hermet G M BfiledCriticalBartels & Rieger Hermet G M B
Publication of CH189513ApublicationCriticalpatent/CH189513A/en