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发明名称
Modulation system
摘要
申请公布号
US2484636(A)
申请公布日期
1949.10.11
申请号
US19470776297
申请日期
1947.09.26
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
MASON WARREN P.
分类号
H03C7/02;H03H9/30
主分类号
H03C7/02
代理机构
代理人
主权项
地址
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