Film sonore et appareil pour la projection de ce film,申请号FRD873241-传众专利搜索

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发明名称	Film sonore et appareil pour la projection de ce film
摘要
申请公布号	FR873241(A)	申请公布日期	1942.07.02
申请号	FRD873241	申请日期	1941.06.21
申请人		发明人	MERCE JOSE LUIS
分类号	G03B31/00;G11B7/00	主分类号	G03B31/00
代理机构		代理人
主权项
地址

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