MINE ROOF SUPPORTS,申请号USD3514961-传众专利搜索

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发明名称	MINE ROOF SUPPORTS
摘要
申请公布号	US3514961(A)	申请公布日期	1970.06.02
申请号	USD3514961	申请日期	1968.11.19
申请人	MASTABAR MINING EQUIPMENT CO. LTD.	发明人	PETER SHUTTLEWORTH
分类号	E21D23/20;(IPC1-7):E21D15/44	主分类号	E21D23/20
代理机构		代理人
主权项
地址

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