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发明名称
Radiant signaling system
摘要
申请公布号
US1748277(A)
申请公布日期
1930.02.25
申请号
US19220587262
申请日期
1922.09.11
申请人
JOHN HAYS HAMMOND, JR.
发明人
CHAFFEE EMORY LEON
分类号
H04B1/12
主分类号
H04B1/12
代理机构
代理人
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地址
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