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.)
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Application filedfiledCritical
Priority to CS396472ApriorityCriticalpatent/CS163927B1/cs
Priority to DD17115773Aprioritypatent/DD104570A5/xx
Priority to CH776273Aprioritypatent/CH561786A5/xx
Priority to GB2654573Aprioritypatent/GB1425725A/en
Priority to JP6459673Aprioritypatent/JPS5535483B2/ja
Priority to FR7321109Aprioritypatent/FR2187956B1/fr
Publication of CS163927B1publicationCriticalpatent/CS163927B1/cs