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发明名称
Message spacing control system
摘要
申请公布号
US2907002(A)
申请公布日期
1959.09.29
申请号
US19540419226
申请日期
1954.03.29
申请人
RADIO CORPORATION OF AMERICA
发明人
SMITH JOEL N.;AYRES WILLIAM R.
分类号
G11B20/12
主分类号
G11B20/12
代理机构
代理人
主权项
地址
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