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.)
Niterra Co Ltd
Original Assignee
NGK Spark Plug 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 NGK Spark Plug Co LtdfiledCriticalNGK Spark Plug Co Ltd
Priority to JP2117979ApriorityCriticalpatent/JPS55112873A/ja
Publication of JPS55112873ApublicationCriticalpatent/JPS55112873A/ja
Publication of JPS6211187B2publicationCriticalpatent/JPS6211187B2/ja
