Perfectionnements aux machines à écrire et à calculer,申请号FRD37764-传众专利搜索

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发明名称	Perfectionnements aux machines à écrire et à calculer
摘要
申请公布号	FR37764(E)	申请公布日期	1931.01.17
申请号	FRD37764	申请日期	1929.12.10
申请人		发明人	BOUTET RENE-EDMOND
分类号	H04R11/00	主分类号	H04R11/00
代理机构		代理人
主权项
地址

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