Circuits électriques utilisant des valves thermoioniques ou autres appareils analogues,申请号FRD715503-传众专利搜索

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发明名称	Circuits électriques utilisant des valves thermoioniques ou autres appareils analogues
摘要
申请公布号	FR715503(A)	申请公布日期	1931.12.04
申请号	FRD715503	申请日期	1931.04.16
申请人	LE MATERIEL TELEPHONIQUES	发明人
分类号	H04J3/04;H04L5/24	主分类号	H04J3/04
代理机构		代理人
主权项
地址

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