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发明名称
Phonographic device
摘要
申请公布号
US2455529(A)
申请公布日期
1948.12.07
申请号
US19460654655
申请日期
1946.03.15
申请人
POLYTRON CORP.
发明人
SHORTT HUBERT L.
分类号
G11B3/08
主分类号
G11B3/08
代理机构
代理人
主权项
地址
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