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经营范围
发明名称
Portable highway signal light
摘要
申请公布号
US2591888(A)
申请公布日期
1952.04.08
申请号
US19480065833
申请日期
1948.12.17
申请人
STEFFEN EDWARD F
发明人
STEFFEN EDWARD F.
分类号
G08G1/0955
主分类号
G08G1/0955
代理机构
代理人
主权项
地址
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