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发明名称
Crossbar-switch line-finder system
摘要
申请公布号
US2768240(A)
申请公布日期
1956.10.23
申请号
US19540468443
申请日期
1954.11.12
申请人
INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION
发明人
LEONARD EDWARD J.
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
主权项
地址
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