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发明名称
Ultra short wave device
摘要
申请公布号
US2190515(A)
申请公布日期
1940.02.13
申请号
US19380219386
申请日期
1938.07.15
申请人
GENERAL ELECTRIC COMPANY
发明人
HAHN WILLIAM C.
分类号
H01J25/22
主分类号
H01J25/22
代理机构
代理人
主权项
地址
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