Improvement in dictation machines,申请号GB19340017151-传众专利搜索

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发明名称	Improvement in dictation machines
摘要
申请公布号	GB421036(A)	申请公布日期	1934.12.12
申请号	GB19340017151	申请日期	1934.06.09
申请人	DICTAPHONE CORPORATION	发明人
分类号		主分类号
代理机构		代理人
主权项
地址

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