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Application filed by Beranek Jaroslav, Vaclav Cervinka, Jiri Ing Kichler, Milan KonecnyfiledCriticalBeranek Jaroslav
Priority to CS847107ApriorityCriticalpatent/CS243195B1/en
Publication of CS710784A1publicationCriticalpatent/CS710784A1/en
Publication of CS243195B1publicationCriticalpatent/CS243195B1/en