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发明名称
Combination microphone and control means for dictating machines
摘要
申请公布号
US2452830(A)
申请公布日期
1948.11.02
申请号
US19450580182
申请日期
1945.02.28
申请人
THOMAS A. EDISON, INCORPORATED
发明人
BRAUN GUSTAV F.
分类号
G11B15/02
主分类号
G11B15/02
代理机构
代理人
主权项
地址
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