Glow discharge sign,申请号US19310572089-传众专利搜索

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发明名称	Glow discharge sign
摘要
申请公布号	US2004995(A)	申请公布日期	1935.06.18
申请号	US19310572089	申请日期	1931.10.30
申请人	HYGRADE SYLVANIA CORPORATION	发明人	BEL CLARENCE J. LE
分类号	H01J17/49	主分类号	H01J17/49
代理机构		代理人
主权项
地址

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