of the multiple-choice answer type, i.e. where a given question is provided with a series of answers and a choice has to be made

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Manually- or mechanically-operated teaching appliances working with questions and answers > of the multiple-choice answer type, i.e. where a given question is provided with a series of answers and a choice has to be made

CPC:

Manually or mechanically operated teaching appliances working with questions and answers (electrically-operated G09B7/00; advertising or displaying in general G09F) > of the multiple-choice answer type, i.e. where a given question is provided with a series of answers and a choice has to be made

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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G09B 3/08 of chart form (having one set of answers common to a plurality of questions G09B3/12) +1 CPC IPC+CPC Available in IPC and CPC
G09B 3/10 wherein one set of answers is common to a plurality of questions IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class G09,2013–2023, worldwide · Source: EPO PATSTAT

SAMSUNG DISPLAY KR 16,046
BOE TECHNOLOGY GROUP COMPANY 13,766
BOE TECHNOLOGY GROUP COMPANY CN 12,804
LG DISPLAY COMPANY KR 10,322
SAMSUNG ELECTRONICS COMPANY KR 7,738
SAMSUNG DISPLAY 5,172
SEMICONDUCTOR ENERGY LABORATORY COMPANY 4,749
SEMICONDUCTOR ENERGY LABORATORY COMPANY JP 3,417
LG DISPLAY COMPANY 3,335
SONY CORPORATION JP 3,179

Top Applicants (CPC)

Class G09,2013–2023, worldwide · Source: EPO PATSTAT

SAMSUNG DISPLAY KR 22,477
BOE TECHNOLOGY GROUP COMPANY CN 16,016
BOE TECHNOLOGY GROUP COMPANY 12,918
LG DISPLAY COMPANY KR 12,599
SAMSUNG ELECTRONICS COMPANY KR 12,009
SAMSUNG DISPLAY 6,252
SEMICONDUCTOR ENERGY LABORATORY COMPANY JP 4,410
SONY CORPORATION JP 3,965
LG ELECTRONICS KR 3,901
LG DISPLAY COMPANY 3,705