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发明名称
Sound reproducer
摘要
申请公布号
US1872672(A)
申请公布日期
1932.08.23
申请号
US19280263011
申请日期
1928.03.20
申请人
COLUMBIA PHONOGRAPH COMPANY, INC.
发明人
CAPPS FRANK L.
分类号
G11B3/46
主分类号
G11B3/46
代理机构
代理人
主权项
地址
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