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 Е.Л. Бочковская, Е.Л. БочковскаfiledCriticalЕ.Л. Бочковская
Priority to SU2140ApriorityCriticalpatent/SU72035A1/en
Application grantedgrantedCritical
Publication of SU72035A1publicationCriticalpatent/SU72035A1/en