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发明名称
Improved sound record for reproduction by magnetic or electrical means
摘要
申请公布号
GB389728(A)
申请公布日期
1933.03.23
申请号
GB19320022862
申请日期
1932.08.15
申请人
HANS VOGT
发明人
分类号
G11B5/78;G11B9/00;G11B9/06;G11B23/00
主分类号
G11B5/78
代理机构
代理人
主权项
地址
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