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DIFF Subgroup
B41J 7/28

Key lever and type member returned independently to rest position

Introduced: September 1968

Title

Titles differ between systems:

IPC: Key-lever and type-member returned independently to rest position

CPC: Key lever and type member returned independently to rest position

Full Title

Full titles differ between systems:

IPC:

Type-selecting or type-actuating mechanisms > Type-lever actuating mechanisms > Key-lever and type-member returned independently to rest position

CPC:

Type-selecting or type-actuating mechanisms (index setting B41J5/02) > Type-lever actuating mechanisms > Key lever and type member returned independently to rest position

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