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Filing date
Publication date
Application filed by Petr Fiegr, Bohumil KopalfiledCriticalPetr Fiegr
Priority to CS868613ApriorityCriticalpatent/CS259129B1/en
Publication of CS861386A1publicationCriticalpatent/CS861386A1/en
Publication of CS259129B1publicationCriticalpatent/CS259129B1/en