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 GB3545465ApriorityCriticalpatent/GB1101587A/en
Priority to CH1210265Aprioritypatent/CH453700A/de
Priority claimed from CH1210265Aexternal-prioritypatent/CH453700A/de
Application filedfiledCritical
Priority to NL6511476Aprioritypatent/NL6511476A/xx
Priority to BE672648Dprioritypatent/BE672648A/xx
Publication of NL6511476ApublicationCriticalpatent/NL6511476A/xx