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 Н.В. ВологодскийfiledCriticalН.В. Вологодский
Priority to SU2531791/10ApriorityCriticalpatent/RU645430C/ru
Priority claimed from SU2531791/10Aexternal-prioritypatent/RU645430C/ru
Application grantedgrantedCritical
Publication of SU645430A1publicationCriticalpatent/SU645430A1/ru
Publication of RU645430CpublicationCriticalpatent/RU645430C/ru