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Priority claimed from KR2019860004080Uexternal-prioritypatent/KR900002894Y1/en
Priority claimed from KR2019860008266Uexternal-prioritypatent/KR900002941Y1/en
Application filed by Choi Moo WoongfiledCriticalChoi Moo Woong
Priority claimed from EP87104528Aexternal-prioritypatent/EP0239941B1/en
Application grantedgrantedCritical
Publication of ATE55799T1publicationCriticalpatent/ATE55799T1/en