Improvements in or relating to systems for carrier-frequency telephony,申请号GB19350025923-传众专利搜索

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发明名称	Improvements in or relating to systems for carrier-frequency telephony
摘要
申请公布号	GB462984(A)	申请公布日期	1937.03.18
申请号	GB19350025923	申请日期	1935.09.18
申请人	SIEMENS & HALSKE AKTIENGESELLSCHAFT	发明人
分类号	H04B1/52;H04B3/38	主分类号	H04B1/52
代理机构		代理人
主权项
地址

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