Lanterne électrique de mine desservie par air comprimé,申请号FRD847704-传众专利搜索

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发明名称	Lanterne électrique de mine desservie par air comprimé
摘要
申请公布号	FR847704(A)	申请公布日期	1939.10.16
申请号	FRD847704	申请日期	1938.12.19
申请人	FRIEMANN & WOLF, GESELLSCHAFT MIT BESCHRANKTER HAFTUNG	发明人
分类号	F21S9/04	主分类号	F21S9/04
代理机构		代理人
主权项
地址

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