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 FR114639Aexternal-prioritypatent/FR1550129A/fr
Application filedfiledCritical
Application grantedgrantedCritical
Publication of SU440820A1publicationCriticalpatent/SU440820A1/ru
Publication of SU440820A3publicationCriticalpatent/SU440820A3/ru