CPC Subgroup
B21D 1/145 Full Title
Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom (B21D3/00 takes precedence); Stretching sheet metal combined with rolling (working sheet metal of limited length by stretching B21D25/00; by localised hammering B21D31/06) > Straightening frame structures
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