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发明名称
Variable-light-producing apparatus
摘要
申请公布号
US1774382(A)
申请公布日期
1930.08.26
申请号
US19270178478
申请日期
1927.03.25
申请人
GENERAL ELECTRIC COMPANY
发明人
KELLOGG EDWARD W.
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
主权项
地址
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