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 JP150585UpriorityCriticalpatent/JPS6330522Y2/ja
Priority to CA000499390Aprioritypatent/CA1272179A/en
Publication of JPS61119094UpublicationCriticalpatent/JPS61119094U/ja
Priority to US07/175,671prioritypatent/US4957710A/en
Application grantedgrantedCritical
Publication of JPS6330522Y2publicationCriticalpatent/JPS6330522Y2/ja