Fault indicator device for amplifier tubes,申请号US19400365560-传众专利搜索

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发明名称	Fault indicator device for amplifier tubes
摘要
申请公布号	US2345042(A)	申请公布日期	1944.03.28
申请号	US19400365560	申请日期	1940.11.13
申请人	JOACHIM FRUNDT HANS;WILHELM SCHONFELD	发明人	FRUNDT HANS JOACHIM;SCHONFELD WILHELM
分类号	H01J9/42	主分类号	H01J9/42
代理机构		代理人
主权项
地址

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