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经营范围
发明名称
Improvements in and relating to cinematograph sound films
摘要
申请公布号
GB389434(A)
申请公布日期
1933.03.16
申请号
GB19320035080
申请日期
1932.12.10
申请人
I. G. FARBENINDUSTRIE AKTIENGESELLSCHAFT
发明人
分类号
G11B13/06
主分类号
G11B13/06
代理机构
代理人
主权项
地址
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