A new and improved impulse transmitter or sender for signalling systems, telephone systems and the like,申请号GB19300004747-传众专利搜索

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发明名称	A new and improved impulse transmitter or sender for signalling systems, telephone systems and the like
摘要
申请公布号	GB348546(A)	申请公布日期	1931.05.12
申请号	GB19300004747	申请日期	1930.02.12
申请人	ERICSSON TELEPHONES LIMITED;PETER DOIG	发明人
分类号	H04M1/274	主分类号	H04M1/274
代理机构		代理人
主权项
地址

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