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发明名称
Luminous device
摘要
申请公布号
US1812058(A)
申请公布日期
1931.06.30
申请号
US19290398952
申请日期
1929.10.11
申请人
UNITED STATES RADIUM CORPORATION
发明人
PAUL JOHN E.
分类号
E21B31/18;F21V9/16
主分类号
E21B31/18
代理机构
代理人
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地址
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