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经营范围
发明名称
Digit-absorbing selector
摘要
申请公布号
US2883466(A)
申请公布日期
1959.04.21
申请号
US19540447835
申请日期
1954.08.04
申请人
INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION
发明人
HUTTON ROBERT W.
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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