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经营范围
发明名称
Improvements in or relating to cathode ray apparatus
摘要
申请公布号
GB543977(A)
申请公布日期
1942.03.23
申请号
GB19400012905
申请日期
1940.08.12
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
分类号
G09G1/18
主分类号
G09G1/18
代理机构
代理人
主权项
地址
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