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发明名称
Graphic speed recorder for vehicles
摘要
申请公布号
US2245784(A)
申请公布日期
1941.06.17
申请号
US19370160638
申请日期
1937.08.24
申请人
MABEL JAMES;FLORENCE L. CROMWELL
发明人
分类号
G01P1/12
主分类号
G01P1/12
代理机构
代理人
主权项
地址
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