Manually or mechanically operated teaching appliances working with questions and answers (electrically-operated G09B7/00; advertising or displaying in general G09F)

Child Classifications

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• G09B 3/02 of the type wherein the student is expected to construct an answer to the question which is presented or wherein the machine gives an answer to the question presented by a student
• G09B 3/06 of the multiple-choice answer type, i.e. where a given question is provided with a series of answers and a choice has to be made