Step switch device for regulating transformers,申请号US19350016656-传众专利搜索

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发明名称	Step switch device for regulating transformers
摘要
申请公布号	US2231627(A)	申请公布日期	1941.02.11
申请号	US19350016656	申请日期	1935.04.16
申请人	BERNHARD JANSEN	发明人	JANSEN BERNHARD
分类号	H01H9/00	主分类号	H01H9/00
代理机构		代理人
主权项
地址

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