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发明名称
Record changing phonograph
摘要
申请公布号
US2490678(A)
申请公布日期
1949.12.06
申请号
US19430500484
申请日期
1943.08.30
申请人
WEBSTER-CHICAGO CORPORATION
发明人
DALE COLIN B.
分类号
G11B17/16
主分类号
G11B17/16
代理机构
代理人
主权项
地址
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