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发明名称
Telephone set
摘要
申请公布号
US1752429(A)
申请公布日期
1930.04.01
申请号
US19280284225
申请日期
1928.06.09
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
FOWLER CLARENCE B.
分类号
H04M1/70
主分类号
H04M1/70
代理机构
代理人
主权项
地址
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