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 С.А. Баккал, А.С. ИсаковичfiledCriticalС.А. Баккал
Priority to SU138009ApriorityCriticalpatent/SU39341A1/en
Application grantedgrantedCritical
Publication of SU39341A1publicationCriticalpatent/SU39341A1/en