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发明名称
Phonograph pick-up
摘要
申请公布号
US1803273(A)
申请公布日期
1931.04.28
申请号
US19290380779
申请日期
1929.07.25
申请人
THE CLEVELAND TRUST COMPANY
发明人
SAWYER CHARLES B.
分类号
H04R17/04
主分类号
H04R17/04
代理机构
代理人
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