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经营范围
发明名称
TEACHING MACHINE
摘要
申请公布号
CA721463(A)
申请公布日期
1965.11.16
申请号
CAD721463
申请日期
申请人
JACK W. HANNAH
发明人
JACK W. HANNAH
分类号
主分类号
代理机构
代理人
主权项
地址
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