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发明名称
Adapter
摘要
申请公布号
US1809887(A)
申请公布日期
1931.06.16
申请号
US19300464505
申请日期
1930.06.28
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
BROADWELL HOWARD
分类号
H04M1/24
主分类号
H04M1/24
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代理人
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