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发明名称
Electrodynamic pickup
摘要
申请公布号
US2509968(A)
申请公布日期
1950.05.30
申请号
US19460685192
申请日期
1946.07.20
申请人
HARTFORD NATIONAL BANK AND TRUST COMPANY
发明人
BOER JAN DE;SCHENKEL GERRIT
分类号
H04R9/12
主分类号
H04R9/12
代理机构
代理人
主权项
地址
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