Improvements in or relating to sound boxes for use in a machine for recording dictation,申请号GB19320023521-传众专利搜索

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发明名称	Improvements in or relating to sound boxes for use in a machine for recording dictation
摘要
申请公布号	GB389733(A)	申请公布日期	1933.03.23
申请号	GB19320023521	申请日期	1932.08.23
申请人	DICTAPHONE CORPORATION	发明人
分类号	H04R1/38	主分类号	H04R1/38
代理机构		代理人
主权项
地址

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