Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filedfiledCritical
Priority to JP1987081596UpriorityCriticalpatent/JPH0631919Y2/ja
Priority to US07/198,435prioritypatent/US4871676A/en
Priority to CA000567800Aprioritypatent/CA1306712C/en
Priority to DE8888108516Tprioritypatent/DE3878989T2/de
Priority to EP88108516Aprioritypatent/EP0293782B1/en
Publication of JPS63187897UpublicationCriticalpatent/JPS63187897U/ja
Application grantedgrantedCritical
Publication of JPH0631919Y2publicationCriticalpatent/JPH0631919Y2/ja