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经营范围
发明名称
SIGNALING SYSTEM
摘要
申请公布号
CA301427(A)
申请公布日期
1930.06.24
申请号
CAD301427
申请日期
申请人
THE CANADIAN WESTINGHOUSE COMPANY LIMITED
发明人
VLADIMIR K. ZWORYKIN
分类号
主分类号
代理机构
代理人
主权项
地址
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