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CPC Subgroup
B21B 37/28

Control of flatness or profile during rolling of strip, sheets or plates

Full Title

Control devices or methods specially adapted for metal-rolling mills or the work produced thereby (methods or devices for measuring specially adapted for metal-rolling mills B21B38/00) > Control of flatness or profile during rolling of strip, sheets or plates

5 direct subcodes

Child Classifications

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  • B21B 37/38 using roll bending (B21B37/42 takes precedence)
  • B21B 37/40 using axial shifting of the rolls (B21B37/42 takes precedence)
  • B21B 37/42 using a combination of roll bending and axial shifting of the rolls
  • B21B 37/44 using heating, lubricating or water-spray cooling of the product

Top Applicants

Top 10 applicants by patent filingsfor class B21, 2013–2023, worldwide · Source: EPO PATSTAT

  1. JFE STEEL JP 2,667
  2. NIPPON STEEL CORPORATION JP 2,049
  3. POSCO (POHANG IRON AND STEEL COMPANY) KR 1,967
  4. NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 1,800
  5. SMS GROUP DE 1,538
  6. JFE STEEL 1,150
  7. ARCELORMITTAL LU 1,142
  8. BAOSHAN IRON & STEEL COMPANY 821
  9. HYUNDAI STEEL COMPANY KR 808
  10. THYSSENKRUPP STEEL EUROPE DE 660