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经营范围
发明名称
Phonograph record cutter and playback combination
摘要
申请公布号
US1946581(A)
申请公布日期
1934.02.13
申请号
US19290383801
申请日期
1929.08.06
申请人
UNITED RESEARCH CORPORATION
发明人
HEAD ROBERT
分类号
G11B3/36
主分类号
G11B3/36
代理机构
代理人
主权项
地址
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