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发明名称
Telephone substation apparatus
摘要
申请公布号
US2356031(A)
申请公布日期
1944.08.15
申请号
US19420466263
申请日期
1942.11.20
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
CARROLL LOUIS W.
分类号
H04M5/12
主分类号
H04M5/12
代理机构
代理人
主权项
地址
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