Perfectionnements aux sonneries alimentées en courant continu,申请号FRD1055175-传众专利搜索

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发明名称	Perfectionnements aux sonneries alimentées en courant continu
摘要
申请公布号	FR1055175(A)	申请公布日期	1954.02.16
申请号	FRD1055175	申请日期	1952.04.25
申请人		发明人	DUCRUET ARTHUR
分类号	G10K1/063	主分类号	G10K1/063
代理机构		代理人
主权项
地址

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