Electronic telephone system,申请号US19550507321-传众专利搜索

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发明名称	Electronic telephone system
摘要
申请公布号	US2868881(A)	申请公布日期	1959.01.13
申请号	US19550507321	申请日期	1955.05.10
申请人	GENERAL DYNAMICS CORPORATION	发明人	TROUSDALC ROBERT B.
分类号	H04Q11/04	主分类号	H04Q11/04
代理机构		代理人
主权项
地址

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