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经营范围
发明名称
Lehrgerät
摘要
申请公布号
CH493053(A)
申请公布日期
1970.06.30
申请号
CH19690003090
申请日期
1969.02.28
申请人
RUBENSTEIN,LEONARD
发明人
RUBENSTEIN,LEONARD
分类号
G09B5/06;G11B21/04;(IPC1-7):G09B5/06
主分类号
G09B5/06
代理机构
代理人
主权项
地址
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