Improvements in or relating to electric signalling apparatus for use in conjunction with an automatic telephone system,申请号GB19350034676-传众专利搜索

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发明名称	Improvements in or relating to electric signalling apparatus for use in conjunction with an automatic telephone system
摘要
申请公布号	GB467204(A)	申请公布日期	1937.06.14
申请号	GB19350034676	申请日期	1935.12.13
申请人	EDWARD SHIPTON	发明人
分类号	H04M11/04	主分类号	H04M11/04
代理机构		代理人
主权项
地址

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