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发明名称
Telephone system
摘要
申请公布号
US2832832(A)
申请公布日期
1958.04.29
申请号
US19520326453
申请日期
1952.12.17
申请人
GENERAL DYNAMICS CORPORATION
发明人
TROUSDALE ROBERT B.
分类号
H04Q11/04
主分类号
H04Q11/04
代理机构
代理人
主权项
地址
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