Simplex and duplex telegraph system,申请号US19390252165-传众专利搜索

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发明名称	Simplex and duplex telegraph system
摘要
申请公布号	US2246073(A)	申请公布日期	1941.06.17
申请号	US19390252165	申请日期	1939.01.21
申请人	RADIO CORPORATION	发明人	SMITH ARTHUR Z.
分类号	H04L5/14	主分类号	H04L5/14
代理机构		代理人
主权项
地址

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