DIFF Subgroup
G09B 15/08 Practice keyboards (for teaching typing G09B13/02)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Practice keyboards
CPC: Practice keyboards (for teaching typing G09B13/02)
Full Title
Full titles differ between systems:
IPC:
Teaching music > Practice keyboards
CPC:
Teaching music (metronomes G04F5/02) > Practice keyboards (for teaching typing G09B13/02)
No child classifications to compare. This is a leaf node in both IPC and CPC.