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.)
Pentel Co Ltd
Original Assignee
Pentel 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 Pentel Co LtdfiledCriticalPentel Co Ltd
Priority to JP4015680ApriorityCriticalpatent/JPS56137997A/ja
Priority to DE19813112869prioritypatent/DE3112869A1/de
Publication of JPS56137997ApublicationCriticalpatent/JPS56137997A/ja
Priority to US06/525,798prioritypatent/US4504163A/en
Publication of JPS6315159B2publicationCriticalpatent/JPS6315159B2/ja