Improvements in or relating to telephone instruments,申请号GB19350002271-传众专利搜索

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发明名称	Improvements in or relating to telephone instruments
摘要
申请公布号	GB448894(A)	申请公布日期	1936.06.17
申请号	GB19350002271	申请日期	1935.01.23
申请人	DOUGLAS STUART SPENS STEUART;NINA BENITA MARY DOUGLAS HAMILTON	发明人
分类号	H04M1/04	主分类号	H04M1/04
代理机构		代理人
主权项
地址

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