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经营范围
发明名称
Improvements in or relating to apparatus for electrically recording signals
摘要
申请公布号
GB426488(A)
申请公布日期
1935.04.04
申请号
GB19330027327
申请日期
1933.10.04
申请人
ELECTRICAL RESEARCH PRODUCTS INC.
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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