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PCE
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DIFF Subgroup
G03B 27/72

Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus

Introduced: September 1968

Full Title

Photographic printing apparatus > Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus

Of 6 combined children, 3 exist in both systems.

3 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • G03B 27/722 CPC only CPC only
  • G03B 27/725 CPC only CPC only
  • G03B 27/727 CPC only CPC only
  • G03B 27/74 Positioning exposure meters in the apparatus IPC+CPC Available in IPC and CPC
  • G03B 27/80 in dependence upon automatic analysis of the original (G03B27/73 takes precedence) since 1980 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class G03,2013–2023, worldwide · Source: EPO PATSTAT

  1. CANON 31,416
  2. CANON JP 17,469
  3. KYOCERA DOCUMENT SOLUTIONS 9,845
  4. RICOH COMPANY 9,807
  5. ASML NETHERLANDS NL 9,427
  6. FUJIFILM JP 7,225
  7. KONICA MINOLTA CORPORATION 7,216
  8. FUJI XEROX COMPANY 5,711
  9. CARL ZEISS SMT DE 4,971
  10. RICOH COMPANY JP 4,123

Top Applicants (CPC)

Class G03,2013–2023, worldwide · Source: EPO PATSTAT

  1. CANON JP 19,215
  2. CANON 12,916
  3. ASML NETHERLANDS NL 10,000
  4. FUJIFILM JP 7,814
  5. SAMSUNG ELECTRONICS COMPANY KR 5,181
  6. CARL ZEISS SMT DE 5,079
  7. RICOH COMPANY JP 4,343
  8. LG INNOTEK COMPANY KR 4,054
  9. KYOCERA DOCUMENT SOLUTIONS 3,812
  10. KYOCERA DOCUMENT SOLUTIONS JP 3,682