Perfectionnements aux reproducteurs à aiguille basés sur la magnétostriction,申请号FRD714731-传众专利搜索

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发明名称	Perfectionnements aux reproducteurs à aiguille basés sur la magnétostriction
摘要
申请公布号	FR714731(A)	申请公布日期	1931.11.19
申请号	FRD714731	申请日期	1931.04.03
申请人	COMPAGNIE FRANCAISE POUR L'EXPLOITATION DES PROCEDES THOMSON-HOUSTON	发明人
分类号	H04R15/00	主分类号	H04R15/00
代理机构		代理人
主权项
地址

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