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Application filed by Bohumil Ing Hybler, Oldrich KreuzfiledCriticalBohumil Ing Hybler
Priority to CS861497ApriorityCriticalpatent/CS253193B1/en
Publication of CS149786A1publicationCriticalpatent/CS149786A1/en
Publication of CS253193B1publicationCriticalpatent/CS253193B1/en