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经营范围
发明名称
Filament activating means
摘要
申请公布号
US1940184(A)
申请公布日期
1933.12.19
申请号
US19300476392
申请日期
1930.08.19
申请人
POLIN, INC.
发明人
POLIN HERBERT S.
分类号
H01J9/04
主分类号
H01J9/04
代理机构
代理人
主权项
地址
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