Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alois Piskala, Frantisek SormfiledCriticalAlois Piskala
Priority to CS491373ApriorityCriticalpatent/CS177477B1/en
Priority to SE7406370Aprioritypatent/SE7406370L/
Priority to DE19742423824prioritypatent/DE2423824A1/en
Priority to FR7419305Aprioritypatent/FR2235948A1/en
Publication of CS177477B1publicationCriticalpatent/CS177477B1/en