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 Percival LaferfiledCriticalPercival Lafer
Priority to IT21498/87ApriorityCriticalpatent/IT1222175B/it
Publication of IT8721498A0publicationCriticalpatent/IT8721498A0/it
Application grantedgrantedCritical
Publication of IT1222175BpublicationCriticalpatent/IT1222175B/it