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Application filed by Larsson GoranfiledCriticalLarsson Goran
Priority to SE7801506ApriorityCriticalpatent/SE7801506L/sv
Publication of SE7801506LpublicationCriticalpatent/SE7801506L/sv
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
G09B15/001—Boards or like means for providing an indication of chords
G09B15/002—Electrically operated systems
G09B15/003—Electrically operated systems with indication of the keys or strings to be played on instruments