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G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
G09B29/00—Maps; Plans; Charts; Diagrams, e.g. route diagram
G09B29/10—Map spot or coordinate position indicators; Map reading aids
G09B29/102—Map spot or coordinate position indicators; Map reading aids using electrical means
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FR682835D1929-10-071929-10-07Dispositif pour la lecture des cartes géographiques, vues, images, inscriptions et leur équivalent
ExpiredFR682835A
(fr)