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发明名称
Improvements in or relating to educational devices for children
摘要
申请公布号
GB816076(A)
申请公布日期
1959.07.08
申请号
GB19560029042
申请日期
1956.09.22
申请人
PHILIP & TACEY LIMITED
发明人
TACEY CHARLES ARTHUR
分类号
G09B1/36;G09B1/40
主分类号
G09B1/36
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代理人
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