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发明名称
Means for supporting elements in an electron device
摘要
申请公布号
US1822731(A)
申请公布日期
1931.09.08
申请号
US19300435412
申请日期
1930.03.13
申请人
ARCTURUS RADIO TUBE COMPANY
发明人
JR. ROBERT HARDING,
分类号
H01J19/42
主分类号
H01J19/42
代理机构
代理人
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地址
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