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发明名称
Telephone systems
摘要
申请公布号
US2851536(A)
申请公布日期
1958.09.09
申请号
US19550541270
申请日期
1955.10.18
申请人
AUTOMATIC TELEPHONE & ELECTRIC COMPANY LIMITED
发明人
GALVIN JOHN LESLIE
分类号
H04M3/523
主分类号
H04M3/523
代理机构
代理人
主权项
地址
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