Improvements in or relating to apparatus for sound recording,申请号GB19330025258-传众专利搜索

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发明名称	Improvements in or relating to apparatus for sound recording
摘要
申请公布号	GB405919(A)	申请公布日期	1934.02.15
申请号	GB19330025258	申请日期	1933.09.12
申请人	UNITED RESEARCH CORPORATION	发明人
分类号	H04R1/08	主分类号	H04R1/08
代理机构		代理人
主权项
地址

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