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.)
Nitto Kohki Co Ltd
Tokyo Gas Co Ltd
Original Assignee
Nitto Kohki Co Ltd
Tokyo Gas 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 Nitto Kohki Co Ltd, Tokyo Gas Co LtdfiledCriticalNitto Kohki Co Ltd
Priority to JP1989044584UpriorityCriticalpatent/JPH0741990Y2/ja
Publication of JPH02135792UpublicationCriticalpatent/JPH02135792U/ja
Application grantedgrantedCritical
Publication of JPH0741990Y2publicationCriticalpatent/JPH0741990Y2/ja