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发明名称
Record tablet
摘要
申请公布号
US2043769(A)
申请公布日期
1936.06.09
申请号
US19320592548
申请日期
1932.02.12
申请人
DICTAPHONE CORPORATION
发明人
NORTON LELAND D.
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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