Electro-acoustic announcing device for transportation means,申请号GB19380037197-传众专利搜索

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发明名称	Electro-acoustic announcing device for transportation means
摘要
申请公布号	GB522966(A)	申请公布日期	1940.07.02
申请号	GB19380037197	申请日期	1938.12.21
申请人	EUGEN BEYER	发明人
分类号	B61D41/00	主分类号	B61D41/00
代理机构		代理人
主权项
地址

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