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PCE
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DIFF Subgroup
B41B 21/18

defining a single optical path

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Common details of photographic composing machines of the kinds covered in groups and > Optical systems > defining a single optical path

CPC:

Common details of photographic composing machines of the kinds covered in groups B41B17/00 and B41B19/00 > Optical systems (shutters B41B21/02; light sources B41B21/08) > defining a single optical path

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

Child Classifications

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  • B41B 21/20 with means for moving stepwise IPC+CPC Available in IPC and CPC
  • B41B 21/22 with means for moving continuously IPC+CPC Available in 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