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发明名称
Dictaphone machine
摘要
申请公布号
US1978448(A)
申请公布日期
1934.10.30
申请号
US19320608908
申请日期
1932.05.03
申请人
ROBERT M. LACKEY;MICHAEL SPEIGEL
发明人
BAKER THOMAS F.
分类号
G11B25/02
主分类号
G11B25/02
代理机构
代理人
主权项
地址
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