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PCE
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DIFF Subgroup
B41J 5/28

Multiple-action keys, e.g. keys depressed by two or more amounts or movable in two or more directions to effect different functions or selections

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Devices or arrangements for controlling character selection > Character or syllable selected by means of keys or keyboards of the typewriter type > Multiple-action keys, e.g. keys depressed by two or more amounts or movable in two or more directions to effect different functions or selections

CPC:

Devices or arrangements for controlling character selection (methods or arrangements for sensing record carriers G06K7/00) > Character or syllable selected by means of keys or keyboards of the typewriter type > Multiple-action keys, e.g. keys depressed by two or more amounts or movable in two or more directions to effect different functions or selections

No child classifications to compare. This is a leaf node in both IPC and CPC.

Top Applicants

Top Applicants (IPC)

Class B41,2013–2023, worldwide · Source: EPO PATSTAT

  1. SEIKO EPSON CORPORATION 14,672
  2. CANON 14,153
  3. RICOH COMPANY 8,049
  4. SEIKO EPSON CORPORATION JP 8,044
  5. HEWLETT-PACKARD DEVELOPMENT COMPANY US 7,312
  6. BROTHER INDUSTRIES 6,887
  7. KYOCERA DOCUMENT SOLUTIONS 5,463
  8. CANON JP 5,001
  9. KONICA MINOLTA CORPORATION 4,512
  10. BROTHER INDUSTRIES JP 3,681

Top Applicants (CPC)

Class B41,2013–2023, worldwide · Source: EPO PATSTAT

  1. SEIKO EPSON CORPORATION 8,446
  2. SEIKO EPSON CORPORATION JP 8,438
  3. HEWLETT-PACKARD DEVELOPMENT COMPANY US 7,828
  4. CANON JP 5,419
  5. CANON 4,156
  6. BROTHER INDUSTRIES JP 3,763
  7. BROTHER INDUSTRIES 2,779
  8. RICOH COMPANY JP 2,717
  9. FUJIFILM JP 2,423
  10. RICOH COMPANY 1,739