Perfectionnements aux dispositifs électriques amplificateurs du type thermoionique,申请号FRD725422-传众专利搜索

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发明名称	Perfectionnements aux dispositifs électriques amplificateurs du type thermoionique
摘要
申请公布号	FR725422(A)	申请公布日期	1932.05.12
申请号	FRD725422	申请日期	1931.10.29
申请人	LE MATERIEL TELEPHONIQUE	发明人
分类号	H04B3/10	主分类号	H04B3/10
代理机构		代理人
主权项
地址

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