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发明名称
Radio program annunciator
摘要
申请公布号
US2207394(A)
申请公布日期
1940.07.09
申请号
US19370149390
申请日期
1937.06.21
申请人
A. H. B. JORDAN
发明人
BABCOCK GARRISON
分类号
G04C23/00
主分类号
G04C23/00
代理机构
代理人
主权项
地址
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