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发明名称
Improvements in or relating to system of operating devices in timed relation
摘要
申请公布号
GB500498(A)
申请公布日期
1939.02.10
申请号
GB19370026594
申请日期
1937.10.01
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
分类号
H04L7/00;H04N5/073
主分类号
H04L7/00
代理机构
代理人
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