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DIFF Subgroup
B21B 39/20

Revolving, turning-over, or like manipulation of work, (guides in which work is subjected to permanent internal twisting B21B15/02)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Revolving, turning-over, or like manipulation of work

CPC: Revolving, turning-over, or like manipulation of work, (guides in which work is subjected to permanent internal twisting B21B15/02)

Full Title

Full titles differ between systems:

IPC:

Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills > Revolving, turning-over, or like manipulation of work

CPC:

Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills (guiding, conveying, or accumulating easily-flexible work in loops or curves B21B41/00; specially associated with cooling-beds B21B43/00; conveying or transporting in general B65G) > Revolving, turning-over, or like manipulation of work, (guides in which work is subjected to permanent internal twisting B21B15/02)

IPC and CPC are identically structured here. All 6 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • B21B 39/24 by tongs or grippers IPC+CPC Available in IPC and CPC
  • B21B 39/26 by members, e.g. grooved, engaging opposite sides of the work and moved relatively to each other to revolve the work IPC+CPC Available in IPC and CPC
  • B21B 39/28 by means of guide members shaped to revolve the work during its passage IPC+CPC Available in IPC and CPC
  • B21B 39/30 by lodging it in a rotating ring manipulator or ring segment manipulator IPC+CPC Available in IPC and CPC
  • B21B 39/32 Devices specially adapted for turning sheets IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class B21,2013–2023, worldwide · Source: EPO PATSTAT

  1. JFE STEEL 2,318
  2. JFE STEEL JP 2,294
  3. POSCO (POHANG IRON AND STEEL COMPANY) KR 2,083
  4. NIPPON STEEL CORPORATION JP 1,650
  5. NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 1,631
  6. SMS GROUP DE 1,472
  7. BAOSHAN IRON & STEEL COMPANY 1,181
  8. SGCC(STATE GRID CORPORATION OF CHINA) 1,079
  9. ANHUI JIANGHUAI AUTOMOBILE 984
  10. HYUNDAI STEEL COMPANY KR 980

Top Applicants (CPC)

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