Method of evacuating vessels, more particularly lamps,申请号US19340729908-传众专利搜索

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发明名称	Method of evacuating vessels, more particularly lamps
摘要
申请公布号	US2099874(A)	申请公布日期	1937.11.23
申请号	US19340729908	申请日期	1934.06.09
申请人	CARL TRENZEN	发明人	TRENZEN CARL
分类号	H01K3/22	主分类号	H01K3/22
代理机构		代理人
主权项
地址

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