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 Philips NvfiledCriticalPhilips Nv
Priority to NL216033ApriorityCriticalpatent/NL107880C/nl
Priority to CH5772258Aprioritypatent/CH377447A/de
Application grantedgrantedCritical
Publication of NL107880CpublicationCriticalpatent/NL107880C/nl