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发明名称
Verfahren zur photographischen Tonaufzeichnung mittels Braunscher Roehre
摘要
申请公布号
DE631582(C)
申请公布日期
1936.06.24
申请号
DE1933G086721D
申请日期
1933.10.31
申请人
DR. HEINRICH GEFFCKEN;DR. HANS RICHTER
发明人
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
主权项
地址
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