• All sections
• G - Physics
• G09B - Educational or demonstration appliancesappliances for teaching, or communicating with, the blind, deaf or mutemodelsplanetariaglobesmapsdiagrams
• G09B 7/04 - Electrically-operated teaching apparatus or devices working with questions and answers 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 the student characterised by modifying the teaching programme in response to a wrong answer, e.g. repeating the question, supplying a further explanation

Patent holdings for IPC class G09B 7/04

Total number of patents in this class: 381

10-year publication summary

Principal owners for this class