Excavating tool,申请号US19400339035-传众专利搜索

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发明名称	Excavating tool
摘要
申请公布号	US2230498(A)	申请公布日期	1941.02.04
申请号	US19400339035	申请日期	1940.06.05
申请人	EDWARD LOOS;RICHARD WITTHUHN	发明人	LOOS EDWARD;WITTHUHN RICHARD
分类号	B66C3/02;E21B11/00	主分类号	B66C3/02
代理机构		代理人
主权项
地址

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