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 CS773173ApriorityCriticalpatent/CS166518B1/cs
Priority to GB4728774Aprioritypatent/GB1464750A/en
Priority to DE19742453275prioritypatent/DE2453275A1/de
Publication of CS166518B1publicationCriticalpatent/CS166518B1/cs