Posthole digger attachment for tractor,申请号US19580707707-传众专利搜索

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发明名称	Posthole digger attachment for tractor
摘要
申请公布号	US2939682(A)	申请公布日期	1960.06.07
申请号	US19580707707	申请日期	1958.01.08
申请人	KROMBERG PAUL J	发明人	KROMBERG PAUL J.
分类号	E21B7/02	主分类号	E21B7/02
代理机构		代理人
主权项
地址

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