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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Application filed by Е.Б. ГольденбергfiledCriticalЕ.Б. Гольденберг
Priority to SU5737ApriorityCriticalpatent/SU73938A1/ru
Application grantedgrantedCritical
Publication of SU73938A1publicationCriticalpatent/SU73938A1/ru