DIFF Subgroup
G09B 15/02 Boards or like means for providing an indication of notes
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Teaching music > Boards or like means for providing an indication of notes
CPC:
Teaching music (metronomes G04F5/02) > Boards or like means for providing an indication of notes
CPC subdivides this area 3x more granularly than IPC with 2 additional codes.
2 codes are CPC-only extensions.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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