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
Priority to DE1965K0056249priorityCriticalpatent/DE1262224B/de
Priority to CH793165Aprioritypatent/CH424719A/de
Application filedfiledCritical
Priority to NL6507653Aprioritypatent/NL6507653A/xx
Priority to FR21581Aprioritypatent/FR1448167A/fr
Publication of NL6507653ApublicationCriticalpatent/NL6507653A/xx