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 В.И. Федоров, В.А. ЧечевичкинfiledCriticalВ.И. Федоров
Priority to SU117297ApriorityCriticalpatent/SU31528A1/ru
Application grantedgrantedCritical
Publication of SU31528A1publicationCriticalpatent/SU31528A1/ru