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发明名称
Vacuum tube grid construction
摘要
申请公布号
US1980341(A)
申请公布日期
1934.11.13
申请号
US19310530262
申请日期
1931.04.15
申请人
THE SPARKS-WITHINGTON COMPANY
发明人
KAYKO CHARLES J.;STOLL PAUL A.
分类号
H01J19/42
主分类号
H01J19/42
代理机构
代理人
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