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发明名称
Magnetic recorder
摘要
申请公布号
US2648589(A)
申请公布日期
1953.08.11
申请号
US19490105542
申请日期
1949.07.19
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
HICKMAN CLARENCE N.
分类号
G11B21/02;H04L17/20;H04M1/64;H04N5/782
主分类号
G11B21/02
代理机构
代理人
主权项
地址
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