Improvements in miners' safety lamps,申请号GB19490028266-传众专利搜索

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发明名称	Improvements in miners' safety lamps
摘要
申请公布号	GB672810(A)	申请公布日期	1952.05.28
申请号	GB19490028266	申请日期	1949.11.04
申请人	SOCIETE ANONYME DES CHARBONNAGES DE BEERINGEN	发明人
分类号	F21V25/12	主分类号	F21V25/12
代理机构		代理人
主权项
地址

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