Electrical signaling system,申请号US19500166520-传众专利搜索

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发明名称	Electrical signaling system
摘要
申请公布号	US2647253(A)	申请公布日期	1953.07.28
申请号	US19500166520	申请日期	1950.06.06
申请人	AUTOMATIC TELEPHONE & ELECTRIC COMPANY LIMITED	发明人	MACKENZIE JOHN FRANCIS;HORROCKS THEODORE
分类号	H02J13/00	主分类号	H02J13/00
代理机构		代理人
主权项
地址

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