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发明名称
Drop-back telephone selector
摘要
申请公布号
US2892893(A)
申请公布日期
1959.06.30
申请号
US19560605531
申请日期
1956.08.22
申请人
GENERAL DYNAMICS CORPORATION
发明人
PHARIS WILLIAM W.
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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