Improvements in or relating to visual signalling devices,申请号GB19290030936-传众专利搜索

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发明名称	Improvements in or relating to visual signalling devices
摘要
申请公布号	GB341097(A)	申请公布日期	1931.01.12
申请号	GB19290030936	申请日期	1929.10.11
申请人	AUTOMATIC TELEPHONE MANUFACTURING COMPANY LIMITED;STANLEY FREDERICK SMITH	发明人
分类号	G08B5/36	主分类号	G08B5/36
代理机构		代理人
主权项
地址

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