Alternating current signaling system,申请号US19480046753-传众专利搜索

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发明名称	Alternating current signaling system
摘要
申请公布号	US2498680(A)	申请公布日期	1950.02.28
申请号	US19480046753	申请日期	1948.08.30
申请人	INTERNATIONAL STANDARD ELECTRIC CORPORATION	发明人	HARGREAVES THOMAS FREDERICK STANLEY
分类号	H04L27/08	主分类号	H04L27/08
代理机构		代理人
主权项
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