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发明名称
Sound record and method of producing same
摘要
申请公布号
US2036554(A)
申请公布日期
1936.04.07
申请号
US19290362847
申请日期
1929.05.13
申请人
THOMAS WILLIAM M
发明人
THOMAS WILLIAM M.
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
主权项
地址
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