Improvements in rheostat devices,申请号GB19400016222-传众专利搜索

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发明名称	Improvements in rheostat devices
摘要
申请公布号	GB543919(A)	申请公布日期	1942.03.19
申请号	GB19400016222	申请日期	1940.11.07
申请人	SONOTONE CORPORATION	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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