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
G09B15/00—Teaching music
G09B15/02—Boards or like means for providing an indication of notes
G09B15/04—Boards or like means for providing an indication of notes with sound emitters
Neuerungen an Apparaten zum Registriren des gezahlten Fahrgeldes bei Omnibus- und anderen ¦ffentlichen Fuhrwerken und zum Markiren der ausgegebenen Fahrscheine.