Improvements in or relating to call recording apparatus for use in telephone systems,申请号GB19290002748-传众专利搜索

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发明名称	Improvements in or relating to call recording apparatus for use in telephone systems
摘要
申请公布号	GB328324(A)	申请公布日期	1930.04.28
申请号	GB19290002748	申请日期	1929.01.26
申请人	ASSOCIATED TELEPHONE & TELEGRAPH COMPANY	发明人
分类号	H04M1/57	主分类号	H04M1/57
代理机构		代理人
主权项
地址

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