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Priority claimed from CH695171Aexternal-prioritypatent/CH547807A/en
Priority claimed from CH767971Aexternal-prioritypatent/CH547813A/en
Priority claimed from CH784871Aexternal-prioritypatent/CH551433A/en
Priority claimed from CH1512071Aexternal-prioritypatent/CH555350A/en
Application filed by Erhard SchenkerfiledCriticalErhard Schenker
Publication of CS179382B2publicationCriticalpatent/CS179382B2/en