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IPC Subgroup
G09C 3/04

wherein the operative connections between the keys and the type-bars are automatically and continuously permuted, during operation, by a coding or key member

Introduced: September 1968

Last revised: January 2006

Full Title

Typewriters for ciphering or deciphering cryptographic text > wherein the operative connections between the keys and the type-bars are automatically and continuously permuted, during operation, by a coding or key member

Classification Context

Section:
PHYSICS
Class:
EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
Subclass:
CIPHERING OR DECIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY

Filing statistics

IPC G09C 3/04 belongs to the parent subclass G09C, which recorded 7,763 patent applications worldwide between 2013 and 2023. Annual filings declined from 680 in 2013 to 264 in 2023 (-61%), peaking at 951 applications in 2015. The most active applicants in class G09 are SAMSUNG DISPLAY (16,046 applications), BOE TECHNOLOGY GROUP COMPANY (13,766 applications) and BOE TECHNOLOGY GROUP COMPANY (12,804 applications).

Source: EPO PATSTAT, worldwide filings

3 direct subcodes

Child Classifications

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  • G09C 3/06 the connections being mechanical
  • G09C 3/08 the connections being electrical
  • G09C 3/1 involving removable or interchangeable coding members, e.g. master tapes, punched cards

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