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发明名称
Telephone system
摘要
申请公布号
US1883589(A)
申请公布日期
1932.10.18
申请号
US19300503164
申请日期
1930.12.18
申请人
ASSOCIATED ELECTRIC LABORATORIES, INC.
发明人
CROCKER THOMAS F.;THARP VICTOR S.
分类号
H04Q3/42
主分类号
H04Q3/42
代理机构
代理人
主权项
地址
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