Heating device for railway switches,申请号US19300503423-传众专利搜索

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发明名称	Heating device for railway switches
摘要
申请公布号	US1959107(A)	申请公布日期	1934.05.15
申请号	US19300503423	申请日期	1930.12.19
申请人	RAY PACKER EBEN	发明人	PACKER EBEN RAY
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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