CPC Main Group
B21K 23/00 Making other articles
2 direct subcodes
Child Classifications
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- B21K 23/02 members of endless tracks, e.g. track guides, shoes (making from sheet-metal B21D)
- B21K 23/04 flanged articles (B21K1/28 takes precedence; flanging tubes B21D)
Top Applicants
Top 10 applicants by patent filingsfor class B21, 2013–2023, worldwide · Source: EPO PATSTAT
- JFE STEEL JP 2,667
- NIPPON STEEL CORPORATION JP 2,049
- POSCO (POHANG IRON AND STEEL COMPANY) KR 1,967
- NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 1,800
- SMS GROUP DE 1,538
- JFE STEEL 1,150
- ARCELORMITTAL LU 1,142
- BAOSHAN IRON & STEEL COMPANY 821
- HYUNDAI STEEL COMPANY KR 808
- THYSSENKRUPP STEEL EUROPE DE 660