Improvements in apparatus for teaching lip reading,申请号GB19350013085-传众专利搜索

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发明名称	Improvements in apparatus for teaching lip reading
摘要
申请公布号	GB440084(A)	申请公布日期	1935.12.19
申请号	GB19350013085	申请日期	1935.05.02
申请人	CHARLES MACKENZIE RAPHAEL BALBI	发明人
分类号	G09B21/06	主分类号	G09B21/06
代理机构		代理人
主权项
地址

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