Electric long-distance indicating system,申请号US19300479831-传众专利搜索

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发明名称	Electric long-distance indicating system
摘要
申请公布号	US2181682(A)	申请公布日期	1939.11.28
申请号	US19300479831	申请日期	1930.09.05
申请人	THE TELEREGISTER CORPORATION	发明人	SCHEIDEGGER HANS ROBERT
分类号	H04L12/18	主分类号	H04L12/18
代理机构		代理人
主权项
地址

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