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
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Application filedfiledCritical
Priority to PL13068868ApriorityCriticalpatent/PL81937B1/xx
Priority to FR6944206Aprioritypatent/FR2026718A1/fr
Priority to NL6919084Aprioritypatent/NL6919084A/xx
Priority to DE19691964211prioritypatent/DE1964211A1/de
Priority to GB1287940Dprioritypatent/GB1287940A/en
Publication of PL81937B1publicationCriticalpatent/PL81937B1/xx