Improvements in or relating to combined sound and picture records, and containers therefor,申请号GB19290034731-传众专利搜索

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发明名称	Improvements in or relating to combined sound and picture records, and containers therefor
摘要
申请公布号	GB343883(A)	申请公布日期	1931.02.13
申请号	GB19290034731	申请日期	1929.11.13
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人
分类号	G11B33/04	主分类号	G11B33/04
代理机构		代理人
主权项
地址

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