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经营范围
发明名称
Electrical vacuum device
摘要
申请公布号
US1871366(A)
申请公布日期
1932.08.09
申请号
US19280282939
申请日期
1928.06.05
申请人
WESTINGHOUSE LAMP COMPANY
发明人
GUSTIN DANIEL SNYDER
分类号
H01J5/32
主分类号
H01J5/32
代理机构
代理人
主权项
地址
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