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经营范围
发明名称
RAILROAD GRADE CROSSING PROTECTION SYSTEM
摘要
申请公布号
US3614418(A)
申请公布日期
1971.10.19
申请号
USD3614418
申请日期
1970.02.26
申请人
MARQUARDT INDUSTRIAL PRODUCTS CO.
发明人
RICHARD V. PELL
分类号
B61L29/28;(IPC1-7):B61L29/32
主分类号
B61L29/28
代理机构
代理人
主权项
地址
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