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DIFF Subgroup
B21G 1/12

Securing, cleaning-off burrs, reconditioning polishing, grinding (takes precedence over B21G1/02 - B21G1/10)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Securing, cleaning-off burrs, reconditioning, polishing, grinding

CPC: Securing, cleaning-off burrs, reconditioning polishing, grinding (takes precedence over B21G1/02 - B21G1/10)

Full Title

Full titles differ between systems:

IPC:

Making needles used for performing operations > Securing, cleaning-off burrs, reconditioning, polishing, grinding

CPC:

Making needles used for performing operations (forming heads on pin-like needles B21G3/12; making U-shaped hairpins B21G7/04) > Securing, cleaning-off burrs, reconditioning polishing, grinding (takes precedence over B21G1/02 - B21G1/10)

No child classifications to compare. This is a leaf node in both 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