Rotary disk bit,申请号US19340723894-传众专利搜索

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发明名称	Rotary disk bit
摘要
申请公布号	US2084442(A)	申请公布日期	1937.06.22
申请号	US19340723894	申请日期	1934.05.04
申请人	GLOBE OIL TOOLS COMPANY	发明人	HOWARD JOHN H.;CATLAND ALFRED C.
分类号	E21B10/12	主分类号	E21B10/12
代理机构		代理人
主权项
地址

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