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发明名称
Means for focusing a varying magnetic field
摘要
申请公布号
US2747140(A)
申请公布日期
1956.05.22
申请号
US19530350489
申请日期
1953.04.22
申请人
GENERAL ELECTRIC COMPANY
发明人
JR. WILLIAM D. RYCKMAN,
分类号
H01J23/10
主分类号
H01J23/10
代理机构
代理人
主权项
地址
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