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发明名称
Modulating device
摘要
申请公布号
US1922654(A)
申请公布日期
1933.08.15
申请号
US19310523404
申请日期
1931.03.18
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
BAIR RALPH S.;BISHOP JOHN B.
分类号
H03C1/20
主分类号
H03C1/20
代理机构
代理人
主权项
地址
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