Improvements in or relating to the production of photographic sound records,申请号GB19300032683-传众专利搜索

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发明名称	Improvements in or relating to the production of photographic sound records
摘要
申请公布号	GB366505(A)	申请公布日期	1932.02.01
申请号	GB19300032683	申请日期	1930.10.30
申请人	SIEMENS & HALSKE AKTIEN-GESELLSCHAFT	发明人
分类号	G03C5/14	主分类号	G03C5/14
代理机构		代理人
主权项
地址

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