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发明名称
Electron lens
摘要
申请公布号
US2740919(A)
申请公布日期
1956.04.03
申请号
US19530364001
申请日期
1953.06.25
申请人
FARRAND OPTICAL CO., INC.
发明人
FLEMING GERTRUDE M.
分类号
H01J37/12
主分类号
H01J37/12
代理机构
代理人
主权项
地址
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