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发明名称
DISPOSITIF POUR L'UTILISATION DE FEUILLES ET ELEMENTS SIMILAIRES D'ENSEIGNEMENT IMPRIMES
摘要
申请公布号
BE772887(A1)
申请公布日期
1972.01.17
申请号
BE19710772887
申请日期
1971.09.21
申请人
KUNERT HEINZ, BELVEDERESTRASSE, 155, 5 COLOGNE 41, (ALLEMAGNE),
发明人
分类号
G09B3/02;G09B3/04;(IPC1-7):G09B/
主分类号
G09B3/02
代理机构
代理人
主权项
地址
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