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经营范围
发明名称
Demonstration apparatus
摘要
申请公布号
US2406751(A)
申请公布日期
1946.09.03
申请号
US19440537556
申请日期
1944.05.27
申请人
PHILCO CORPORATION
发明人
EMERSON KENNETH H.
分类号
G09B9/40
主分类号
G09B9/40
代理机构
代理人
主权项
地址
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