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发明名称
Toll switchboard
摘要
申请公布号
US2744964(A)
申请公布日期
1956.05.08
申请号
US19530331627
申请日期
1953.01.16
申请人
GENERAL DYNAMICS CORPORATION
发明人
REAGAN LEON H.
分类号
H04M3/60;H04M5/08
主分类号
H04M3/60
代理机构
代理人
主权项
地址
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