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Application filed by Josef Ing Csc Kellner, Prikryl Frantisek, Halamek Emil, Jan Rndr Csc Soucek, Vera GrmelovafiledCriticalJosef Ing Csc Kellner
Priority to CS834412ApriorityCriticalpatent/CS239632B1/en
Publication of CS441283A1publicationCriticalpatent/CS441283A1/en
Publication of CS239632B1publicationCriticalpatent/CS239632B1/en