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经营范围
发明名称
Railway signaling system
摘要
申请公布号
US2344324(A)
申请公布日期
1944.03.14
申请号
US19420426745
申请日期
1942.01.14
申请人
THE UNION SWITCH AND SIGNAL COMPANY
发明人
PFLASTERER GEORGE R.
分类号
B61L23/22
主分类号
B61L23/22
代理机构
代理人
主权项
地址
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