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 JP1987171145UpriorityCriticalpatent/JPH0712189Y2/ja
Priority to US07/254,819prioritypatent/US4977487A/en
Publication of JPH0174948UpublicationCriticalpatent/JPH0174948U/ja
Application grantedgrantedCritical
Publication of JPH0712189Y2publicationCriticalpatent/JPH0712189Y2/ja