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PCE
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DIFF 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

Full Title

Full titles differ between systems:

IPC:

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

CPC:

Typewriters for ciphering or deciphering cryptographic text (marking record carriers G06K) > wherein the operative connections between the keys and the type-bars are automatically and continuously permuted, during operation, by a coding or key member

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

Child Classifications

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  • G09C 3/06 the connections being mechanical IPC+CPC Available in IPC and CPC
  • G09C 3/08 the connections being electrical IPC+CPC Available in IPC and CPC
  • G09C 3/10 involving removable or interchangeable coding members, e.g. master tapes, punched cards IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

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

Top Applicants (CPC)

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

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