Patent classifications
G
PHYSICS
Load children
G09
EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
Load children
G09B
EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
Load children
7/00
Electrically-operated teaching apparatus or devices working with questions and answers
Load children Filter patents View analytics View as hierarchy
G09B7/06
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 from the answers
Load children Filter patents View analytics View as hierarchy