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 Karel Ing Houdek, Antonin BrezinafiledCriticalKarel Ing Houdek
Priority to CS865834ApriorityCriticalpatent/CS261475B1/cs
Publication of CS583486A1publicationCriticalpatent/CS583486A1/cs
Publication of CS261475B1publicationCriticalpatent/CS261475B1/cs