Improved heater structure for thermionic device,申请号US19390297805-传众专利搜索

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发明名称	Improved heater structure for thermionic device
摘要
申请公布号	US2260308(A)	申请公布日期	1941.10.28
申请号	US19390297805	申请日期	1939.10.04
申请人	TUNG-SOL LAMP WORKS INC.	发明人	FIDLER ROBERT H.
分类号	H01J1/22	主分类号	H01J1/22
代理机构		代理人
主权项
地址

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