CPC Subgroup
B21B 31/02 Rolling stand frames ; Roll mountings
Full Title
Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames > Rolling stand frames ; Roll mountings
7 direct subcodes
Child Classifications
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- B21B 31/04 with tie rods , e.g. prestressed tie rods
- B21B 31/06 Fastening stands or frames to foundation, e.g. to the sole plate (in general F16M)
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