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发明名称
Wireless train control
摘要
申请公布号
US1786610(A)
申请公布日期
1930.12.30
申请号
US19220582342
申请日期
1922.08.17
申请人
HAMMOND JR JOHN HAYS
发明人
JR. JOHN HAYS HAMMOND,
分类号
B61L3/12
主分类号
B61L3/12
代理机构
代理人
主权项
地址
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