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.)
Filing date
Publication date
Application filed by В.С. КаминскийfiledCriticalВ.С. Каминский
Priority to SU537ApriorityCriticalpatent/SU77354A1/en
Application grantedgrantedCritical
Publication of SU77354A1publicationCriticalpatent/SU77354A1/en