Improvements in or relating to ringers such as may be used in telephone subsets,申请号GB19380036327-传众专利搜索

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发明名称	Improvements in or relating to ringers such as may be used in telephone subsets
摘要
申请公布号	GB522493(A)	申请公布日期	1940.06.19
申请号	GB19380036327	申请日期	1938.12.13
申请人	LOUIS JACQUES GHISLAIN NYS;FRANS VAN LAETHEM	发明人
分类号	G10K1/062	主分类号	G10K1/062
代理机构		代理人
主权项
地址

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