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 И.Ф. ГринчукfiledCriticalИ.Ф. Гринчук
Priority to SU34788ApriorityCriticalpatent/SU16800A1/en
Application grantedgrantedCritical
Publication of SU16800A1publicationCriticalpatent/SU16800A1/en