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发明名称
VORRICHTUNG ZUM BELIEBIGEN ANHEFTEN UND UEBEREINANDERHEFTEN SOWIE ABNEHMEN UND UMHEFTEN VON LEHRMITTELN ODER SONSTIGEN GEGENSTAENDEN ALLER ART AN UNTERRICHTSTATELN, ANZEIGETAFELN OD. DGL.
摘要
申请公布号
DE1693535(U)
申请公布日期
1955.02.24
申请号
DE195400F8418U
申请日期
1954.10.25
申请人
FRITZ FORTENBACHER
发明人
FRITZ FORTENBACHER
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主分类号
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