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Application filedfiledCritical
Priority to DD17717274ApriorityCriticalpatent/DD114302A1/xx
Priority to HU74IA00000717Aprioritypatent/HU171276B/hu
Priority to SU7402078333Aprioritypatent/SU564470A1/ru
Priority to CS64175Aprioritypatent/CS172431B1/cs
Publication of DD114302A1publicationCriticalpatent/DD114302A1/xx