B21H 3/12 articles with helicoidal surface (bending strip or the like helically B21D11/06)
Full Title
Making helical bodies or bodies having parts of helical shape (helical gears B21H5/00; forming tubes or tube walls into helical shape B21D11/06, B21D15/04) > articles with helicoidal surface (bending strip or the like helically B21D11/06)
Filing statistics
CPC B21H 3/12 belongs to the parent subclass B21H, which recorded 4,989 patent applications worldwide between 2013 and 2023. Annual filings grew from 291 in 2013 to 358 in 2023 (+23%), peaking at 640 applications in 2018. The most active applicants in class B21 are JFE STEEL (2,667 applications), NIPPON STEEL CORPORATION (2,049 applications) and POSCO (POHANG IRON AND STEEL COMPANY) (1,967 applications).
Source: EPO PATSTAT, worldwide filings
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