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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
G09B13/00—Teaching typing
G09B13/02—Dummy practice keyboard apparatus
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FR927717D1946-06-071946-06-07Machine pour l'enseignement de la dactylographie
ExpiredFR927717A
(fr)