Electric heater for subsurface materials,申请号US19440550210-传众专利搜索

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发明名称	Electric heater for subsurface materials
摘要
申请公布号	US2484063(A)	申请公布日期	1949.10.11
申请号	US19440550210	申请日期	1944.08.19
申请人	THERMACTOR CORPORATION	发明人	ACKLEY CHARLES S.
分类号	E21B36/04	主分类号	E21B36/04
代理机构		代理人
主权项
地址

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