Selector switch cleaner,申请号US19300464640-传众专利搜索

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发明名称	Selector switch cleaner
摘要
申请公布号	US1842350(A)	申请公布日期	1932.01.19
申请号	US19300464640	申请日期	1930.06.28
申请人	THE ELYRIA TELEPHONE COMPANY	发明人	GEITGEY IRVIN
分类号	H04Q1/20	主分类号	H04Q1/20
代理机构		代理人
主权项
地址

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