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 Bernasconi Fils De Paul Charle, Walther Fils De Jules Naters RfiledCriticalBernasconi Fils De Paul Charle
Publication of CH50151ApublicationCriticalpatent/CH50151A/fr