Method of and means for signaling,申请号US19280313394-传众专利搜索

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发明名称	Method of and means for signaling
摘要
申请公布号	US1796965(A)	申请公布日期	1931.03.17
申请号	US19280313394	申请日期	1928.10.19
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	RYAN FRANCIS M.
分类号	H04B14/00	主分类号	H04B14/00
代理机构		代理人
主权项
地址

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