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发明名称
Sound recording system
摘要
申请公布号
US2349888(A)
申请公布日期
1944.05.30
申请号
US19420462831
申请日期
1942.10.21
申请人
RADIO CORPORATION
发明人
SINNETT CHESTER M.
分类号
G11B3/00
主分类号
G11B3/00
代理机构
代理人
主权项
地址
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