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 Ph Bonvillain & E Roncery Sa DfiledCriticalPh Bonvillain & E Roncery Sa D
Publication of CH64860ApublicationCriticalpatent/CH64860A/en