Improvements in variable electric resistances,申请号GB19310009133-传众专利搜索

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发明名称	Improvements in variable electric resistances
摘要
申请公布号	GB375392(A)	申请公布日期	1932.06.27
申请号	GB19310009133	申请日期	1931.03.25
申请人	JOHN RONALD SPINK;JAMES BARTLEY LANGLEY	发明人
分类号	H01C10/32	主分类号	H01C10/32
代理机构		代理人
主权项
地址

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