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经营范围
发明名称
Prompting apparatus
摘要
申请公布号
GB804547(A)
申请公布日期
1958.11.19
申请号
GB19550029023
申请日期
1955.10.12
申请人
JESS OPPENHEIMER
发明人
分类号
A63J25/00;H04N5/222
主分类号
A63J25/00
代理机构
代理人
主权项
地址
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