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.)
Hitachi Construction Machinery Co Ltd
Tokyo Gas Co Ltd
Original Assignee
Hitachi Construction Machinery 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 Hitachi Construction Machinery Co Ltd, Tokyo Gas Co LtdfiledCriticalHitachi Construction Machinery Co Ltd
Priority to JP24621884ApriorityCriticalpatent/JPS61126289A/ja
Publication of JPS61126289ApublicationCriticalpatent/JPS61126289A/ja
Publication of JPH0417278B2publicationCriticalpatent/JPH0417278B2/ja