Improvements in or relating to indicator calling installations,申请号GB19430015488-传众专利搜索

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发明名称	Improvements in or relating to indicator calling installations
摘要
申请公布号	GB580967(A)	申请公布日期	1946.09.26
申请号	GB19430015488	申请日期	1943.09.21
申请人	LANDIS & GYR S.A.	发明人
分类号	G08B3/10	主分类号	G08B3/10
代理机构		代理人
主权项
地址

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