MEANS FOR APPLYING WEDGING FORCE TO MINERAL AND OTHER BODIES,申请号USD3572840-传众专利搜索

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发明名称	MEANS FOR APPLYING WEDGING FORCE TO MINERAL AND OTHER BODIES
摘要
申请公布号	US3572840(A)	申请公布日期	1971.03.30
申请号	USD3572840	申请日期	1969.03.21
申请人	H.E. FLETCHER CO.	发明人	RALPH A. FLETCHER
分类号	E21C37/04;(IPC1-7):E21C37/04	主分类号	E21C37/04
代理机构		代理人
主权项
地址

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