DIFF Subgroup
G09B 5/06 with both visual and audible presentation of the material to be studied
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Electrically-operated educational appliances > with both visual and audible presentation of the material to be studied
CPC:
Electrically-operated educational appliances (working with questions and answers G09B7/00; simulators G09B9/00; advertising or displaying in general G09F) > with both visual and audible presentation of the material to be studied
Of 3 combined children, 0 exist in both systems.
3 codes are CPC-only extensions.
Child Classifications
Navigate with arrow keys, Enter to open