Door-operated signal,申请号US19300471171-传众专利搜索

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发明名称	Door-operated signal
摘要
申请公布号	US1783267(A)	申请公布日期	1930.12.02
申请号	US19300471171	申请日期	1930.07.28
申请人	CHARLES TILLBERG	发明人	TILLBERG CHARLES
分类号	G08B3/02	主分类号	G08B3/02
代理机构		代理人
主权项
地址

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