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发明名称
SELECTIVE SIGNALLING SYSTEMS AND APPARATUS
摘要
申请公布号
CA468714(A)
申请公布日期
1950.10.10
申请号
CAD468714
申请日期
申请人
TELETYPE CORPORATION
发明人
WALTER J. ZENNER
分类号
主分类号
代理机构
代理人
主权项
地址
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