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经营范围
发明名称
Automatic train control and signal
摘要
申请公布号
US1765355(A)
申请公布日期
1930.06.17
申请号
US19160070579
申请日期
1916.01.06
申请人
SPRAGUE SAFETY CONTROL AND SIGNAL CORPORATION
发明人
BREWSTER CHARLES W.
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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