CPC Main Group
B21B 31/00 Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
4 direct subcodes
Child Classifications
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- B21B 31/02 Rolling stand frames ; Roll mountings
- B21B 31/07 Adaptation of roll bearings (bearings in general F16C)
- B21B 31/08 Interchanging rolls, roll mountings, or stand frames
- B21B 31/16 Adjusting rolls (control devices B21B37/00)
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