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发明名称
Winding key
摘要
申请公布号
US1999457(A)
申请公布日期
1935.04.30
申请号
US19320646414
申请日期
1932.12.09
申请人
RADIO CORPORATION
发明人
HOEHN JOHN J.
分类号
主分类号
代理机构
代理人
主权项
地址
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