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Application filed by Vaclav Maixner, Josef VondracekfiledCriticalVaclav Maixner
Priority to CS853594ApriorityCriticalpatent/CS255404B1/cs
Publication of CS359485A1publicationCriticalpatent/CS359485A1/cs
Publication of CS255404B1publicationCriticalpatent/CS255404B1/cs