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PCE
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CPC Subgroup
G03B 9/58

Means for varying duration of "open" period of shutter

Full Title

Exposure-making shutters; Diaphragms > Means for varying duration of "open" period of shutter

2 direct subcodes

Child Classifications

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  • G03B 9/60 by varying speed of movement of obturating members
  • G03B 9/62 by varying interval of time between end of opening movement and beginning of closing movement

Top Applicants

Top 10 applicants by patent filingsfor 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