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IPC Subgroup
G09B 7/1

wherein a set of answers is common to a plurality of questions

Introduced: September 1968

Last revised: January 2006

Full Title

Electrically-operated teaching apparatus or devices 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 from the answers > wherein a set of answers is common to a plurality of questions

Classification Context

Section:
PHYSICS
Class:
EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
Subclass:
EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS

1 direct subcode

Child Classifications

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  • G09B 7/12 characterised by modifying the teaching programme in response to a wrong answer, e.g. repeating the question or supplying further information

Top Applicants

Top 10 applicants by patent filingsfor class G09, 2013–2023, worldwide · Source: EPO PATSTAT

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