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发明名称
System of broadcasting
摘要
申请公布号
US1851175(A)
申请公布日期
1932.03.29
申请号
US19270233801
申请日期
1927.11.17
申请人
HAMMOND JR JOHN HAYS
发明人
JR. JOHN HAYS HAMMOND,
分类号
H04B14/08
主分类号
H04B14/08
代理机构
代理人
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