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 CS129172ApriorityCriticalpatent/CS159936B1/cs
Priority to IT2062673Aprioritypatent/IT979308B/it
Priority to GB962873Aprioritypatent/GB1411351A/en
Priority to DE19732309897prioritypatent/DE2309897A1/de
Publication of CS159936B1publicationCriticalpatent/CS159936B1/cs