Improvements in safety lamps for coal mines, garages, sewers or the like,申请号GB19290020489-传众专利搜索

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发明名称	Improvements in safety lamps for coal mines, garages, sewers or the like
摘要
申请公布号	GB334008(A)	申请公布日期	1930.08.28
申请号	GB19290020489	申请日期	1929.07.04
申请人	ERNEST ARTHUR HAILWOOD	发明人
分类号	F21L23/00	主分类号	F21L23/00
代理机构		代理人
主权项
地址

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