Loud-speaking telephone set with low acoustic coupling,申请号US19460691279-传众专利搜索

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发明名称	Loud-speaking telephone set with low acoustic coupling
摘要
申请公布号	US2483231(A)	申请公布日期	1949.09.27
申请号	US19460691279	申请日期	1946.08.17
申请人	AUTOMATIC ELECTRIC LABORATORIES, INC.	发明人	PETERSON EDWARD S.
分类号	H04R1/28;H04R1/34	主分类号	H04R1/28
代理机构		代理人
主权项
地址

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