Electrical signaling device,申请号US19330672797-传众专利搜索

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发明名称	Electrical signaling device
摘要
申请公布号	US2039765(A)	申请公布日期	1936.05.05
申请号	US19330672797	申请日期	1933.05.25
申请人	THE ELECTRIC STORAGE BATTERY COMPANY	发明人	BEETEM FRANK G.
分类号	H02J7/34	主分类号	H02J7/34
代理机构		代理人
主权项
地址

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