Improvements in or relating to sodium-vapour dark-room lamps,申请号GB19470001757-传众专利搜索

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发明名称	Improvements in or relating to sodium-vapour dark-room lamps
摘要
申请公布号	GB645346(A)	申请公布日期	1950.11.01
申请号	GB19470001757	申请日期	1947.01.20
申请人	PHILIPS LAMPS LIMITED	发明人
分类号	H05B41/04	主分类号	H05B41/04
代理机构		代理人
主权项
地址

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