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发明名称
Telephone system
摘要
申请公布号
US1846262(A)
申请公布日期
1932.02.23
申请号
US19310538303
申请日期
1931.05.18
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
发明人
KITTREDGE LINUS E.
分类号
H04M3/64
主分类号
H04M3/64
代理机构
代理人
主权项
地址
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