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Priority to JP1987161248UpriorityCriticalpatent/JPH0166414U/ja
Priority to CA000566754Aprioritypatent/CA1328588C/en
Priority to US07/194,389prioritypatent/US4856486A/en
Priority to EP88304425Aprioritypatent/EP0291358B1/en
Priority to DE88304425Tprioritypatent/DE3881758T2/de
Publication of JPH0166414UpublicationCriticalpatent/JPH0166414U/ja