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发明名称
Beam focusing system
摘要
申请公布号
US2944182(A)
申请公布日期
1960.07.05
申请号
US19580773612
申请日期
1958.11.13
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
RIGROD WILLIAM W.
分类号
H01J23/087
主分类号
H01J23/087
代理机构
代理人
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地址
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