Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Teaching device for self and immediate checking of answer to questions - has question form with columns for questions and selection of answers and answer and checking fields
Plattenpraegemaschine, bei der zunaechst das zu praegende Zeichen auf einem Schrift-zeichenfelde mittels eines Handhebels eingestellt und alsdann beim Herabdruecken des Handhebels der betreffende Stempel zwecks Praegens vorgeschoben wird