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发明名称
Radio signaling system
摘要
申请公布号
US1889292(A)
申请公布日期
1932.11.29
申请号
US19310526530
申请日期
1931.03.30
申请人
S.A. BREVETTI ITALIANI ESTERI S.A.B.I.E.
发明人
RICCHIARDI PIER CARLO
分类号
H04B1/48;H04B1/54
主分类号
H04B1/48
代理机构
代理人
主权项
地址
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