Improvements in or relating to sound signal apparatus,申请号GB19390007645-传众专利搜索

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发明名称	Improvements in or relating to sound signal apparatus
摘要
申请公布号	GB526250(A)	申请公布日期	1940.09.13
申请号	GB19390007645	申请日期	1939.03.09
申请人	WALLACE & TIERNAN PRODUCTS, INC.	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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