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Publication of FR1152510ApublicationCriticalpatent/FR1152510A/fr
G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
G09B15/00—Teaching music
G09B15/02—Boards or like means for providing an indication of notes
G09B15/026—Non-electrically operated
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FR1152510D1956-06-261956-06-26Dispositif pour l'enseignement de la musique
ExpiredFR1152510A
(fr)