Anchored support for mining tools,申请号US19300465232-传众专利搜索

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发明名称	Anchored support for mining tools
摘要
申请公布号	US1791382(A)	申请公布日期	1931.02.03
申请号	US19300465232	申请日期	1930.07.01
申请人	ALADAR SCHAFER	发明人	SCHAFER ALADAR
分类号	E21B15/00	主分类号	E21B15/00
代理机构		代理人
主权项
地址

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