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 Schreibbuecher Fabrik Bern J MfiledCriticalSchreibbuecher Fabrik Bern J M
Publication of CH32800ApublicationCriticalpatent/CH32800A/de