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发明名称
Volume control system
摘要
申请公布号
US2035263(A)
申请公布日期
1936.03.24
申请号
US19330672964
申请日期
1933.05.26
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
CUSHMAN ROBERT W.;HILL HENRY E.
分类号
H03G7/00;H03G7/02;H04B1/64
主分类号
H03G7/00
代理机构
代理人
主权项
地址
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