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Priority to JP1987197170UpriorityCriticalpatent/JPH0546218Y2/ja
Priority to US07/287,383prioritypatent/US4948381A/en
Priority to CA000586612Aprioritypatent/CA1292292C/en
Priority to EP88403320Aprioritypatent/EP0323340B1/en
Priority to DE3888662Tprioritypatent/DE3888662T2/de
Publication of JPH01100374UpublicationCriticalpatent/JPH01100374U/ja
Application grantedgrantedCritical
Publication of JPH0546218Y2publicationCriticalpatent/JPH0546218Y2/ja