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.)
Komatsu Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Komatsu Ltd
Nippon Telegraph and Telephone Corp
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 Komatsu Ltd, Nippon Telegraph and Telephone CorpfiledCriticalKomatsu Ltd
Priority to JP7570875ApriorityCriticalpatent/JPS521937A/en
Publication of JPS521937ApublicationCriticalpatent/JPS521937A/en