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 filedfiledCritical
Priority to NL6703494ApriorityCriticalpatent/NL6703494A/xx
Priority to DE19681753132prioritypatent/DE1753132A1/de
Priority to FR1555303Dprioritypatent/FR1555303A/fr
Priority to CH310668Aprioritypatent/CH477860A/de
Priority to GB1010368Aprioritypatent/GB1188239A/en
Priority to NO78768Aprioritypatent/NO118501B/no
Priority to AT202268Aprioritypatent/AT283529B/de
Priority to BE711650Dprioritypatent/BE711650A/xx
Publication of NL6703494ApublicationCriticalpatent/NL6703494A/xx