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.)
G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
G09B21/00—Teaching, or communicating with, the blind, deaf or mute
G09B21/001—Teaching or communicating with blind persons
G09B21/003—Teaching or communicating with blind persons using tactile presentation of the information, e.g. Braille displays