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Application filed by Teodor Krizan, Stefan Godal, Viktor Ing VasilofiledCriticalTeodor Krizan
Priority to CS862631ApriorityCriticalpatent/CS257116B1/cs
Publication of CS263186A1publicationCriticalpatent/CS263186A1/cs
Publication of CS257116B1publicationCriticalpatent/CS257116B1/cs