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PCE
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DIFF Subgroup
B21K 1/28

wheels; discs

Introduced: September 1968

Full Title

Making machine elements > wheels; discs

IPC and CPC are identically structured here. All 7 subcodes exist in both systems.

Child Classifications

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  • B21K 1/32 discs, e.g. disc wheels IPC+CPC Available in IPC and CPC
  • B21K 1/34 wheels with spokes IPC+CPC Available in IPC and CPC
  • B21K 1/36 with blades IPC+CPC Available in IPC and CPC
  • B21K 1/38 rims; tyres IPC+CPC Available in IPC and CPC
  • B21K 1/40 hubs IPC+CPC Available in IPC and CPC
  • B21K 1/42 pulleys, e.g. cable pulleys 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