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Priority to JP1988097384UpriorityCriticalpatent/JPH0222026U/ja
Priority to CA000583218Aprioritypatent/CA1318948C/en
Priority to DE3850047Tprioritypatent/DE3850047T2/de
Priority to US07/271,866prioritypatent/US4933512A/en
Priority to EP88119136Aprioritypatent/EP0316911B1/en
Priority to KR1019880015169Aprioritypatent/KR910009362B1/ko
Publication of JPH0222026UpublicationCriticalpatent/JPH0222026U/ja