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发明名称
Method and apparatus for indicating potential gradients
摘要
申请公布号
US2454630(A)
申请公布日期
1948.11.23
申请号
US19450571919
申请日期
1945.01.08
申请人
UNITED AIR LINES, INC.
发明人
BUCKTHAL ELMER P.
分类号
G01R29/24
主分类号
G01R29/24
代理机构
代理人
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