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 Soc D Lampes Electr A Arc SystfiledCriticalSoc D Lampes Electr A Arc Syst
Publication of CH16618ApublicationCriticalpatent/CH16618A/en