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.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aoi Blackboard Manufacturing Co Ltd
Original Assignee
Aoi Blackboard Manufacturing Co Ltd
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 filed by Aoi Blackboard Manufacturing Co LtdfiledCriticalAoi Blackboard Manufacturing Co Ltd
Priority to JP60281592ApriorityCriticalpatent/JPS62141278A/ja
Publication of JPS62141278ApublicationCriticalpatent/JPS62141278A/ja
Publication of JPH0461152B2publicationCriticalpatent/JPH0461152B2/ja