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经营范围
发明名称
Crater lamp
摘要
申请公布号
US2457771(A)
申请公布日期
1948.12.28
申请号
US19470719852
申请日期
1947.01.02
申请人
SYLVANIA ELECTRIC PRODUCTS INC.
发明人
BOUCHARD GEORGE H.
分类号
H01J17/06
主分类号
H01J17/06
代理机构
代理人
主权项
地址
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