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.)
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Publication date
Application filed by Б.С. Городиский, М.С. ФарбштейнfiledCriticalБ.С. Городиский
Priority to SU62805ApriorityCriticalpatent/SU19552A1/en
Application grantedgrantedCritical
Publication of SU19552A1publicationCriticalpatent/SU19552A1/en