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经营范围
发明名称
Apparatus for indicating instantaneously and at a remote point the tuning condition of one or more wave signal receivers
摘要
申请公布号
US2676085(A)
申请公布日期
1954.04.20
申请号
US19490074075
申请日期
1949.02.02
申请人
A. C. NIELSEN COMPANY
发明人
FREEMAN ROBERT L.
分类号
H04H60/43
主分类号
H04H60/43
代理机构
代理人
主权项
地址
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