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
Priority claimed from IT21249/72Aexternal-prioritypatent/IT949753B/it
Priority claimed from IN447/CAL/73Aexternal-prioritypatent/IN139722B/en
Application filed by Snam ProgettifiledCriticalSnam Progetti
Priority to IN1409/CAL/75ApriorityCriticalpatent/IN138879B/en
Publication of IN138879BpublicationCriticalpatent/IN138879B/en
