TELEPHONE RINGING SIGNAL TRANSFER DEVICE,申请号USD3515813-传众专利搜索

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发明名称	TELEPHONE RINGING SIGNAL TRANSFER DEVICE
摘要
申请公布号	US3515813(A)	申请公布日期	1970.06.02
申请号	USD3515813	申请日期	1968.01.04
申请人	AUTOMATIC ELECTRIC LAB. INC.	发明人	ROBERT T. CLEARY
分类号	H04M1/00;(IPC1-7):H04M3/58	主分类号	H04M1/00
代理机构		代理人
主权项
地址

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