Portable heater for tracks and switches,申请号US19350012573-传众专利搜索

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法人/股东/高管

发明名称	Portable heater for tracks and switches
摘要
申请公布号	US2055839(A)	申请公布日期	1936.09.29
申请号	US19350012573	申请日期	1935.03.23
申请人	GREENFIELD WILLIAM H	发明人	GREENFIELD WILLIAM H.
分类号	E01B7/24	主分类号	E01B7/24
代理机构		代理人
主权项
地址

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