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 Л.И. Анисимов, Б.Ф. ГалковскийfiledCriticalЛ.И. Анисимов
Priority to SU98729ApriorityCriticalpatent/SU31244A1/ru
Application grantedgrantedCritical
Publication of SU31244A1publicationCriticalpatent/SU31244A1/ru