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 Piacentini Bruno Piacentini EnfiledCriticalPiacentini Bruno Piacentini En
Priority to IT22616/81ApriorityCriticalpatent/IT1137959B/en
Publication of IT8122616A0publicationCriticalpatent/IT8122616A0/en
Application grantedgrantedCritical
Publication of IT1137959BpublicationCriticalpatent/IT1137959B/en