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发明名称
Telephone subset
摘要
申请公布号
US2757241(A)
申请公布日期
1956.07.31
申请号
US19520328735
申请日期
1952.12.30
申请人
GENERAL DYNAMICS CORPORATION
发明人
DROEL LOUIS W.
分类号
H04M1/52
主分类号
H04M1/52
代理机构
代理人
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