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发明名称
Apparatus for recording electrical impulses
摘要
申请公布号
US1989973(A)
申请公布日期
1935.02.05
申请号
US19320610300
申请日期
1932.05.09
申请人
RADIO CORPORATION OF AMERICA
发明人
DIMMICK GLENN L.
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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