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发明名称
AUTOMATIC SWITCHING SYSTEM
摘要
申请公布号
CA444821(A)
申请公布日期
1947.11.04
申请号
CAD444821
申请日期
申请人
ASSOCIATED TELEPHONE AND TELEGRAPH COMPANY;AUTOMATIC ELECTRIC LABORATORIES
发明人
BERNARD D. WILLIS
分类号
主分类号
代理机构
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