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发明名称
Method of and system for recording audio-frequency waves
摘要
申请公布号
US2400953(A)
申请公布日期
1946.05.28
申请号
US19430502096
申请日期
1943.09.13
申请人
RADIO CORPORATION
发明人
ROYS HENRY E.
分类号
H03F1/36
主分类号
H03F1/36
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代理人
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