Plug trap and indicator apparatus,申请号US19460685029-传众专利搜索

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发明名称	Plug trap and indicator apparatus
摘要
申请公布号	US2467860(A)	申请公布日期	1949.04.19
申请号	US19460685029	申请日期	1946.07.20
申请人	BAKER OIL TOOLS, INC.	发明人	SAURENMAN DEAN F.
分类号	E21B33/16	主分类号	E21B33/16
代理机构		代理人
主权项
地址

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