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发明名称
Electric signaling or control system
摘要
申请公布号
US1762906(A)
申请公布日期
1930.06.10
申请号
US19270228453
申请日期
1927.10.24
申请人
A. REYROLLE & COMPANY LIMITED
发明人
WILLOUGHBY RALPH
分类号
H02J13/00
主分类号
H02J13/00
代理机构
代理人
主权项
地址
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