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发明名称
Indicating apparatus
摘要
申请公布号
US2270294(A)
申请公布日期
1942.01.20
申请号
US19390267766
申请日期
1939.04.14
申请人
RADIO CORPORATION
发明人
JR. WALTER SCOTT HALL,
分类号
G01R23/02
主分类号
G01R23/02
代理机构
代理人
主权项
地址
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