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发明名称
Hilfsvorrichtung zum Erlernen des Blindschreibens auf Schreibmaschinen
摘要
申请公布号
CH368949(A)
申请公布日期
1963.04.30
申请号
CH19590074130
申请日期
1959.06.08
申请人
HERMAG, HERMES-SCHREIBMASCHINEN AG
发明人
BAGGENSTOS,AUGUST
分类号
G09B13/04
主分类号
G09B13/04
代理机构
代理人
主权项
地址
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