Crépine de puits,申请号FRD796450-传众专利搜索

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发明名称	Crépine de puits
摘要
申请公布号	FR796450(A)	申请公布日期	1936.04.07
申请号	FRD796450	申请日期	1935.10.17
申请人	EDWARD E. JOHNSON, INC.	发明人
分类号	E21B43/08	主分类号	E21B43/08
代理机构		代理人
主权项
地址

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