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经营范围
发明名称
COURSE SOFTENING SYSTEM
摘要
申请公布号
CA461931(A)
申请公布日期
1949.12.20
申请号
CAD461931
申请日期
申请人
THE SPERRY CORPORATION
发明人
THOMAS M. FERRILL, JR.
分类号
主分类号
代理机构
代理人
主权项
地址
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