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发明名称
Telephone receiver
摘要
申请公布号
US1831377(A)
申请公布日期
1931.11.10
申请号
US19300474346
申请日期
1930.08.11
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
BLOUNT NELSON
分类号
H04M1/03
主分类号
H04M1/03
代理机构
代理人
主权项
地址
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