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 Hans WiederkehrfiledCriticalHans Wiederkehr
Priority to IT21618/81ApriorityCriticalpatent/IT1137224B/en
Publication of IT8121618A0publicationCriticalpatent/IT8121618A0/en
Application grantedgrantedCritical
Publication of IT1137224BpublicationCriticalpatent/IT1137224B/en