• All sections
• G - Physics
• G09B - Educational or demonstration appliances; appliances for teaching, or communicating with, the blind, deaf or mute; models; planetaria; globes; maps; diagrams
• G09B 3/08 - Manually- or mechanically-operated teaching appliances working with questions and answers 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 of chart form

Patent holdings for IPC class G09B 3/08

Total number of patents in this class: 1

10-year publication summary

Principal owners for this class