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发明名称
Phonograph needle
摘要
申请公布号
US2473374(A)
申请公布日期
1949.06.14
申请号
US19450590329
申请日期
1945.04.26
申请人
HUTTER WILLIAM H
发明人
HUTTER WILLIAM H.
分类号
H04R1/18
主分类号
H04R1/18
代理机构
代理人
主权项
地址
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