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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 Э. А. БрусиловскаfiledCriticalЭ. А. Брусиловска
Priority to SU1828086ApriorityCriticalpatent/SU436364A1/ru
Application grantedgrantedCritical
Publication of SU436364A1publicationCriticalpatent/SU436364A1/ru